686682038 has 32 divisors (see below), whose sum is σ = 1226078208. Its totient is φ = 282290400.

The previous prime is 686681993. The next prime is 686682077. The reversal of 686682038 is 830286686.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 686681983 and 686682001.

It is a congruent number.

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, 27443 + ... + 46113.

It is an arithmetic number, because the mean of its divisors is an integer number (38314944).

Almost surely, 2^686682038 is an apocalyptic number.

686682038 is a deficient number, since it is larger than the sum of its proper divisors (539396170).

686682038 is a wasteful number, since it uses less digits than its factorization.

686682038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18788.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 686682038 is about 26204.6186387057. The cubic root of 686682038 is about 882.2369217994.

The spelling of 686682038 in words is "six hundred eighty-six million, six hundred eighty-two thousand, thirty-eight".