39931038690 has 32 divisors (see below), whose sum is σ = 97147299456. Its totient is φ = 10502409600.

The previous prime is 39931038577. The next prime is 39931038703. The reversal of 39931038690 is 9683013993.

It is a super-2 number, since 2×39931038690² (a number of 22 digits) 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, 9114486 + ... + 9118865.

It is an arithmetic number, because the mean of its divisors is an integer number (3035853108).

Almost surely, 2^39931038690 is an apocalyptic number.

39931038690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39931038690 is an abundant number, since it is smaller than the sum of its proper divisors (57216260766).

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

39931038690 is a wasteful number, since it uses less digits than its factorization.

39931038690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18233434.

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 39931038690 in words is "thirty-nine billion, nine hundred thirty-one million, thirty-eight thousand, six hundred ninety".