10400039988 has 24 divisors (see below), whose sum is σ = 26133434208. Its totient is φ = 3200012256.

The previous prime is 10400039977. The next prime is 10400040023. The reversal of 10400039988 is 88993000401.

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, 33333306 + ... + 33333617.

It is an arithmetic number, because the mean of its divisors is an integer number (1088893092).

Almost surely, 2^10400039988 is an apocalyptic number.

It is an amenable number.

10400039988 is an abundant number, since it is smaller than the sum of its proper divisors (15733394220).

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

10400039988 is a wasteful number, since it uses less digits than its factorization.

10400039988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66666943 (or 66666941 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 10400039988 in words is "ten billion, four hundred million, thirty-nine thousand, nine hundred eighty-eight".