391648344 has 32 divisors (see below), whose sum is σ = 983232000. Its totient is φ = 130001312.

The previous prime is 391648331. The next prime is 391648351. The reversal of 391648344 is 443846193.

It is a junction number, because it is equal to n+sod(n) for n = 391648296 and 391648305.

It is a congruent number.

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, 28404 + ... + 39875.

It is an arithmetic number, because the mean of its divisors is an integer number (30726000).

Almost surely, 2^391648344 is an apocalyptic number.

It is an amenable number.

391648344 is an abundant number, since it is smaller than the sum of its proper divisors (591583656).

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

391648344 is a wasteful number, since it uses less digits than its factorization.

391648344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68527 (or 68523 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 391648344 is about 19790.1072255812. The cubic root of 391648344 is about 731.6422301349.

The spelling of 391648344 in words is "three hundred ninety-one million, six hundred forty-eight thousand, three hundred forty-four".