39990000624 has 80 divisors (see below), whose sum is σ = 118102321920. Its totient is φ = 11422172160.

The previous prime is 39990000607. The next prime is 39990000637. The reversal of 39990000624 is 42600009993.

It is a Cunningham number, because it is equal to 199975²-1.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 1183192 + ... + 1216520.

It is an arithmetic number, because the mean of its divisors is an integer number (1476279024).

Almost surely, 2^39990000624 is an apocalyptic number.

It is an amenable number.

39990000624 is an abundant number, since it is smaller than the sum of its proper divisors (78112321296).

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

39990000624 is a wasteful number, since it uses less digits than its factorization.

39990000624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36918 (or 36912 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The spelling of 39990000624 in words is "thirty-nine billion, nine hundred ninety million, six hundred twenty-four", and thus it is an aban number.