68520392 has 8 divisors (see below), whose sum is σ = 128475750. Its totient is φ = 34260192.

The previous prime is 68520391. The next prime is 68520409. The reversal of 68520392 is 29302586.

It can be written as a sum of positive squares in only one way, i.e., 68128516 + 391876 = 8254^2 + 626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (68520391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4282517 + ... + 4282532.

Almost surely, 2^68520392 is an apocalyptic number.

It is an amenable number.

68520392 is a deficient number, since it is larger than the sum of its proper divisors (59955358).

68520392 is a wasteful number, since it uses less digits than its factorization.

68520392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8565055 (or 8565051 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 68520392 is about 8277.7045127257. The cubic root of 68520392 is about 409.2040715778.

The spelling of 68520392 in words is "sixty-eight million, five hundred twenty thousand, three hundred ninety-two".