39901992860 has 24 divisors (see below), whose sum is σ = 86497224576. Its totient is φ = 15445932480.

The previous prime is 39901992811. The next prime is 39901992983. The reversal of 39901992860 is 6829910993.

It is a junction number, because it is equal to n+sod(n) for n = 39901992796 and 39901992805.

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, 32178407 + ... + 32179646.

It is an arithmetic number, because the mean of its divisors is an integer number (3604051024).

Almost surely, 2^39901992860 is an apocalyptic number.

It is an amenable number.

39901992860 is an abundant number, since it is smaller than the sum of its proper divisors (46595231716).

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

39901992860 is a wasteful number, since it uses less digits than its factorization.

39901992860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64358093 (or 64358091 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 56.

The spelling of 39901992860 in words is "thirty-nine billion, nine hundred one million, nine hundred ninety-two thousand, eight hundred sixty".