39996923904 has 560 divisors, whose sum is σ = 139556947200. Its totient is φ = 11179524096.

The previous prime is 39996923849. The next prime is 39996923929. The reversal of 39996923904 is 40932969993.

39996923904 is a `hidden beast` number, since 399 + 9 + 6 + 9 + 239 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 366944202 + ... + 366944310.

Almost surely, 2^39996923904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39996923904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69778473600).

39996923904 is an abundant number, since it is smaller than the sum of its proper divisors (99560023296).

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

39996923904 is an equidigital number, since it uses as much as digits as its factorization.

39996923904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 63.

The spelling of 39996923904 in words is "thirty-nine billion, nine hundred ninety-six million, nine hundred twenty-three thousand, nine hundred four".