391407888944 has 20 divisors (see below), whose sum is σ = 771206223720. Its totient is φ = 192386928000.

The previous prime is 391407888943. The next prime is 391407888947. The reversal of 391407888944 is 449888704193.

It is not an unprimeable number, because it can be changed into a prime (391407888943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207312557 + ... + 207314444.

It is an arithmetic number, because the mean of its divisors is an integer number (38560311186).

Almost surely, 2^391407888944 is an apocalyptic number.

It is an amenable number.

391407888944 is a deficient number, since it is larger than the sum of its proper divisors (379798334776).

391407888944 is a wasteful number, since it uses less digits than its factorization.

391407888944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414627068 (or 414627062 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 391407888944 in words is "three hundred ninety-one billion, four hundred seven million, eight hundred eighty-eight thousand, nine hundred forty-four".