689680038 has 16 divisors (see below), whose sum is σ = 1460499120. Its totient is φ = 216370176.

The previous prime is 689680009. The next prime is 689680049. The reversal of 689680038 is 830086986.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380683 + ... + 3380886.

It is an arithmetic number, because the mean of its divisors is an integer number (91281195).

Almost surely, 2^689680038 is an apocalyptic number.

689680038 is an abundant number, since it is smaller than the sum of its proper divisors (770819082).

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

689680038 is a wasteful number, since it uses less digits than its factorization.

689680038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761591.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 689680038 is about 26261.7599943340. The cubic root of 689680038 is about 883.5189835811.

The spelling of 689680038 in words is "six hundred eighty-nine million, six hundred eighty thousand, thirty-eight".