38745621928 has 32 divisors (see below), whose sum is σ = 78251715360. Its totient is φ = 17879083200.

The previous prime is 38745621917. The next prime is 38745621931. The reversal of 38745621928 is 82912654783.

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, 538903 + ... + 606553.

It is an arithmetic number, because the mean of its divisors is an integer number (2445366105).

Almost surely, 2^38745621928 is an apocalyptic number.

It is an amenable number.

38745621928 is an abundant number, since it is smaller than the sum of its proper divisors (39506093432).

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

38745621928 is a wasteful number, since it uses less digits than its factorization.

38745621928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73177 (or 73173 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 38745621928 in words is "thirty-eight billion, seven hundred forty-five million, six hundred twenty-one thousand, nine hundred twenty-eight".