68418904 has 8 divisors (see below), whose sum is σ = 128285460. Its totient is φ = 34209448.

The previous prime is 68418871. The next prime is 68418907. The reversal of 68418904 is 40981486.

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

It is a super-2 number, since 2×68418904² = 9362292849122432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68418907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4276174 + ... + 4276189.

Almost surely, 2^68418904 is an apocalyptic number.

It is an amenable number.

68418904 is a deficient number, since it is larger than the sum of its proper divisors (59866556).

68418904 is a wasteful number, since it uses less digits than its factorization.

68418904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552369 (or 8552365 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 68418904 is about 8271.5720392196. The cubic root of 68418904 is about 409.0019428295.

The spelling of 68418904 in words is "sixty-eight million, four hundred eighteen thousand, nine hundred four".