38931230778 has 32 divisors (see below), whose sum is σ = 86333349312. Its totient is φ = 11603942400.

The previous prime is 38931230729. The next prime is 38931230791. The reversal of 38931230778 is 87703213983.

It is a self number, because there is not a number n which added to its sum of digits gives 38931230778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4830951 + ... + 4839002.

It is an arithmetic number, because the mean of its divisors is an integer number (2697917166).

Almost surely, 2^38931230778 is an apocalyptic number.

38931230778 is an abundant number, since it is smaller than the sum of its proper divisors (47402118534).

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

38931230778 is a wasteful number, since it uses less digits than its factorization.

38931230778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9670030.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 38931230778 in words is "thirty-eight billion, nine hundred thirty-one million, two hundred thirty thousand, seven hundred seventy-eight".