68640176 has 20 divisors (see below), whose sum is σ = 145080744. Its totient is φ = 31200000.

The previous prime is 68640157. The next prime is 68640193. The reversal of 68640176 is 67104686.

It is a super-2 number, since 2×68640176² = 9422947522621952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194825 + ... + 195176.

Almost surely, 2^68640176 is an apocalyptic number.

It is an amenable number.

68640176 is an abundant number, since it is smaller than the sum of its proper divisors (76440568).

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

68640176 is a wasteful number, since it uses less digits than its factorization.

68640176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390020 (or 390014 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 68640176 is about 8284.9366925765. The cubic root of 68640176 is about 409.4423829489.

The spelling of 68640176 in words is "sixty-eight million, six hundred forty thousand, one hundred seventy-six".