68978994 has 32 divisors (see below), whose sum is σ = 163105920. Its totient is φ = 19028352.

The previous prime is 68978977. The next prime is 68979007. The reversal of 68978994 is 49987986.

It is a super-2 number, since 2×68978994² = 9516203226504072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27099 + ... + 29534.

It is an arithmetic number, because the mean of its divisors is an integer number (5097060).

Almost surely, 2^68978994 is an apocalyptic number.

68978994 is an abundant number, since it is smaller than the sum of its proper divisors (94126926).

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

68978994 is a wasteful number, since it uses less digits than its factorization.

68978994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56674.

The product of its digits is 7838208, while the sum is 60.

The square root of 68978994 is about 8305.3593540557. The cubic root of 68978994 is about 410.1149667681.

The spelling of 68978994 in words is "sixty-eight million, nine hundred seventy-eight thousand, nine hundred ninety-four".