39426662978 has 16 divisors (see below), whose sum is σ = 61400630016. Its totient is φ = 18967138320.

The previous prime is 39426662959. The next prime is 39426662993. The reversal of 39426662978 is 87926662493.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 39426662978.

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, 1827176 + ... + 1848627.

It is an arithmetic number, because the mean of its divisors is an integer number (3837539376).

Almost surely, 2^39426662978 is an apocalyptic number.

39426662978 is a deficient number, since it is larger than the sum of its proper divisors (21973967038).

39426662978 is a wasteful number, since it uses less digits than its factorization.

39426662978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676009.

The product of its digits is 47029248, while the sum is 62.

The spelling of 39426662978 in words is "thirty-nine billion, four hundred twenty-six million, six hundred sixty-two thousand, nine hundred seventy-eight".