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70078680 = 23325727809
BaseRepresentation
bin1000010110101…
…01000011011000
311212212100212200
410023111003120
5120420004210
610542010200
71510442010
oct413250330
9155770780
1070078680
1136615171
121b576960
1311698599
149442c40
1562440c0
hex42d50d8

70078680 has 96 divisors (see below), whose sum is σ = 260301600. Its totient is φ = 16017408.

The previous prime is 70078663. The next prime is 70078681. The reversal of 70078680 is 8687007.

It is a happy number.

It is a super-2 number, since 2×700786802 = 9822042781084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70078681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11385 + ... + 16424.

It is an arithmetic number, because the mean of its divisors is an integer number (2711475).

Almost surely, 270078680 is an apocalyptic number.

70078680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70078680 is an abundant number, since it is smaller than the sum of its proper divisors (190222920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70078680 is a wasteful number, since it uses less digits than its factorization.

70078680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27833 (or 27826 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 70078680 is about 8371.3009741617. The cubic root of 70078680 is about 412.2828829869.

The spelling of 70078680 in words is "seventy million, seventy-eight thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 252 280 315 360 420 504 630 840 1260 2520 27809 55618 83427 111236 139045 166854 194663 222472 250281 278090 333708 389326 417135 500562 556180 583989 667416 778652 834270 973315 1001124 1112360 1167978 1251405 1557304 1668540 1751967 1946630 2002248 2335956 2502810 2919945 3337080 3503934 3893260 4671912 5005620 5839890 7007868 7786520 8759835 10011240 11679780 14015736 17519670 23359560 35039340 70078680