39890688 has 36 divisors (see below), whose sum is σ = 106169448. Its totient is φ = 13296640.

The previous prime is 39890681. The next prime is 39890693. The reversal of 39890688 is 88609893.

It is a super-2 number, since 2×39890688² = 3182533978226688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39890688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39890681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25203 + ... + 26738.

Almost surely, 2^39890688 is an apocalyptic number.

It is an amenable number.

39890688 is an abundant number, since it is smaller than the sum of its proper divisors (66278760).

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

39890688 is an equidigital number, since it uses as much as digits as its factorization.

39890688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51960 (or 51946 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 39890688 is about 6315.9075357386. The cubic root of 39890688 is about 341.6833702984.

The spelling of 39890688 in words is "thirty-nine million, eight hundred ninety thousand, six hundred eighty-eight".