68639084 has 48 divisors (see below), whose sum is σ = 132765696. Its totient is φ = 30940800.

The previous prime is 68639069. The next prime is 68639089. The reversal of 68639084 is 48093686.

It is a super-2 number, since 2×68639084² = 9422647704718112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68639089) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 116639 + ... + 117225.

It is an arithmetic number, because the mean of its divisors is an integer number (2765952).

Almost surely, 2^68639084 is an apocalyptic number.

It is an amenable number.

68639084 is a deficient number, since it is larger than the sum of its proper divisors (64126612).

68639084 is a wasteful number, since it uses less digits than its factorization.

68639084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 68639084 is about 8284.8707895778. The cubic root of 68639084 is about 409.4402116576.

The spelling of 68639084 in words is "sixty-eight million, six hundred thirty-nine thousand, eighty-four".