39943622928 has 80 divisors (see below), whose sum is σ = 113833339200. Its totient is φ = 11968112640.

The previous prime is 39943622921. The next prime is 39943622933. The reversal of 39943622928 is 82922634993.

It is a super-2 number, since 2×39943622928² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39943622921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378013 + ... + 471996.

It is an arithmetic number, because the mean of its divisors is an integer number (1422916740).

Almost surely, 2^39943622928 is an apocalyptic number.

It is an amenable number.

39943622928 is an abundant number, since it is smaller than the sum of its proper divisors (73889716272).

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

39943622928 is a wasteful number, since it uses less digits than its factorization.

39943622928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850120 (or 850114 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 57.

The spelling of 39943622928 in words is "thirty-nine billion, nine hundred forty-three million, six hundred twenty-two thousand, nine hundred twenty-eight".