39877308920 has 32 divisors (see below), whose sum is σ = 93624988320. Its totient is φ = 15257404800.

The previous prime is 39877308883. The next prime is 39877308923. The reversal of 39877308920 is 2980377893.

It is a super-2 number, since 2×39877308920² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39877308923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21671531 + ... + 21673370.

It is an arithmetic number, because the mean of its divisors is an integer number (2925780885).

Almost surely, 2^39877308920 is an apocalyptic number.

It is an amenable number.

39877308920 is an abundant number, since it is smaller than the sum of its proper divisors (53747679400).

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

39877308920 is a wasteful number, since it uses less digits than its factorization.

39877308920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43344935 (or 43344931 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 39877308920 in words is "thirty-nine billion, eight hundred seventy-seven million, three hundred eight thousand, nine hundred twenty".