391392876996 has 81 divisors (see below), whose sum is σ = 1087586726863. Its totient is φ = 118591389840.

The previous prime is 391392876991. The next prime is 391392877019. The reversal of 391392876996 is 699678293193.

The square root of 391392876996 is 625614.

It is a perfect power (a square), and thus also a powerful number.

391392876996 is a `hidden beast` number, since 3 + 91 + 392 + 8 + 7 + 69 + 96 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391392876991) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 41285785 + ... + 41295263.

Almost surely, 2^391392876996 is an apocalyptic number.

391392876996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

391392876996 is the 625614-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391392876996

391392876996 is an abundant number, since it is smaller than the sum of its proper divisors (696193849867).

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

391392876996 is an equidigital number, since it uses as much as digits as its factorization.

391392876996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18990 (or 9495 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 72.

The spelling of 391392876996 in words is "three hundred ninety-one billion, three hundred ninety-two million, eight hundred seventy-six thousand, nine hundred ninety-six".