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70012580 = 225111572027
BaseRepresentation
bin1000010110001…
…00111010100100
311212202000012112
410023010322210
5120410400310
610540340152
71510045211
oct413047244
9155660175
1070012580
113657a540
121b544658
1311674481
149426b08
15622e705
hex42c4ea4

70012580 has 48 divisors (see below), whose sum is σ = 161493696. Its totient is φ = 25284480.

The previous prime is 70012577. The next prime is 70012597. The reversal of 70012580 is 8521007.

It is a super-2 number, since 2×700125802 = 9803522716512800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33527 + ... + 35553.

It is an arithmetic number, because the mean of its divisors is an integer number (3364452).

Almost surely, 270012580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70012580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80746848).

70012580 is an abundant number, since it is smaller than the sum of its proper divisors (91481116).

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

70012580 is a wasteful number, since it uses less digits than its factorization.

70012580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2202 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 70012580 is about 8367.3520303618. The cubic root of 70012580 is about 412.1532169635.

Adding to 70012580 its reverse (8521007), we get a palindrome (78533587).

The spelling of 70012580 in words is "seventy million, twelve thousand, five hundred eighty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 157 220 314 628 785 1570 1727 2027 3140 3454 4054 6908 8108 8635 10135 17270 20270 22297 34540 40540 44594 89188 111485 222970 318239 445940 636478 1272956 1591195 3182390 3500629 6364780 7001258 14002516 17503145 35006290 70012580