39428743664 has 20 divisors (see below), whose sum is σ = 76425484200. Its totient is φ = 19706038080.

The previous prime is 39428743657. The next prime is 39428743681. The reversal of 39428743664 is 46634782493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481739 + ... + 557610.

It is an arithmetic number, because the mean of its divisors is an integer number (3821274210).

Almost surely, 2^39428743664 is an apocalyptic number.

It is an amenable number.

39428743664 is a deficient number, since it is larger than the sum of its proper divisors (36996740536).

39428743664 is a wasteful number, since it uses less digits than its factorization.

39428743664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041728 (or 1041722 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 56.

The spelling of 39428743664 in words is "thirty-nine billion, four hundred twenty-eight million, seven hundred forty-three thousand, six hundred sixty-four".