38966938978 has 32 divisors (see below), whose sum is σ = 64369679040. Its totient is φ = 17690587200.

The previous prime is 38966938931. The next prime is 38966938991. The reversal of 38966938978 is 87983966983.

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, 2278138 + ... + 2295178.

It is an arithmetic number, because the mean of its divisors is an integer number (2011552470).

Almost surely, 2^38966938978 is an apocalyptic number.

38966938978 is a deficient number, since it is larger than the sum of its proper divisors (25402740062).

38966938978 is a wasteful number, since it uses less digits than its factorization.

38966938978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17935 (or 17913 counting only the distinct ones).

The product of its digits is 846526464, while the sum is 76.

The spelling of 38966938978 in words is "thirty-eight billion, nine hundred sixty-six million, nine hundred thirty-eight thousand, nine hundred seventy-eight".