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68715088 = 24131719433
BaseRepresentation
bin1000001100010…
…00001001010000
311210022002101021
410012020021100
5120042340323
610452445224
71463032351
oct406101120
9153262337
1068715088
1135873732
121b019814
131130ba20
1491a9d28
15607505d
hex4188250

68715088 has 40 divisors (see below), whose sum is σ = 151818408. Its totient is φ = 29847552.

The previous prime is 68715043. The next prime is 68715089. The reversal of 68715088 is 88051786.

It can be written as a sum of positive squares in 4 ways, for example, as 685584 + 68029504 = 828^2 + 8248^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68715089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6181 + ... + 13252.

Almost surely, 268715088 is an apocalyptic number.

68715088 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68715088 is an abundant number, since it is smaller than the sum of its proper divisors (83103320).

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

68715088 is a wasteful number, since it uses less digits than its factorization.

68715088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19471 (or 19465 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 68715088 is about 8289.4564357381. The cubic root of 68715088 is about 409.5912801794.

The spelling of 68715088 in words is "sixty-eight million, seven hundred fifteen thousand, eighty-eight".

Divisors: 1 2 4 8 13 16 17 26 34 52 68 104 136 208 221 272 442 884 1768 3536 19433 38866 77732 155464 252629 310928 330361 505258 660722 1010516 1321444 2021032 2642888 4042064 4294693 5285776 8589386 17178772 34357544 68715088