391868404000 has 48 divisors (see below), whose sum is σ = 962820678456. Its totient is φ = 156747360000.

The previous prime is 391868403977. The next prime is 391868404001. The reversal of 391868404000 is 404868193.

It can be written as a sum of positive squares in 4 ways, for example, as 198370470544 + 193497933456 = 445388^2 + 439884^2 .

It is not an unprimeable number, because it can be changed into a prime (391868404001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48979551 + ... + 48987550.

Almost surely, 2^391868404000 is an apocalyptic number.

It is an amenable number.

391868404000 is an abundant number, since it is smaller than the sum of its proper divisors (570952274456).

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

391868404000 is an equidigital number, since it uses as much as digits as its factorization.

391868404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97967126 (or 97967108 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 391868404000 in words is "three hundred ninety-one billion, eight hundred sixty-eight million, four hundred four thousand".