68591872 has 36 divisors (see below), whose sum is σ = 144978876. Its totient is φ = 32276480.

The previous prime is 68591869. The next prime is 68591879. The reversal of 68591872 is 27819586.

It can be written as a sum of positive squares in 2 ways, for example, as 48664576 + 19927296 = 6976^2 + 4464^2 .

It is not an unprimeable number, because it can be changed into a prime (68591879) 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 3 ways as a sum of consecutive naturals, for example, 3529 + ... + 12232.

It is an arithmetic number, because the mean of its divisors is an integer number (4027191).

Almost surely, 2^68591872 is an apocalyptic number.

It is an amenable number.

68591872 is an abundant number, since it is smaller than the sum of its proper divisors (76387004).

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

68591872 is a wasteful number, since it uses less digits than its factorization.

68591872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15794 (or 15780 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 68591872 is about 8282.0210093914. The cubic root of 68591872 is about 409.3463150812.

The spelling of 68591872 in words is "sixty-eight million, five hundred ninety-one thousand, eight hundred seventy-two".