39999600400 has 60 divisors (see below), whose sum is σ = 96257942272. Its totient is φ = 15973384320.

The previous prime is 39999600379. The next prime is 39999600401. The reversal of 39999600400 is 400699993.

It is not an unprimeable number, because it can be changed into a prime (39999600401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160429 + ... + 325171.

Almost surely, 2^39999600400 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 39999600400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48128971136).

39999600400 is an abundant number, since it is smaller than the sum of its proper divisors (56258341872).

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

39999600400 is a wasteful number, since it uses less digits than its factorization.

39999600400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165368 (or 165357 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 49.

The spelling of 39999600400 in words is "thirty-nine billion, nine hundred ninety-nine million, six hundred thousand, four hundred".