391622368 has 48 divisors (see below), whose sum is σ = 790370784. Its totient is φ = 190955520.

The previous prime is 391622347. The next prime is 391622369. The reversal of 391622368 is 863226193.

It is a self number, because there is not a number n which added to its sum of digits gives 391622368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391622369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219496 + ... + 221272.

It is an arithmetic number, because the mean of its divisors is an integer number (16466058).

Almost surely, 2^391622368 is an apocalyptic number.

It is an amenable number.

391622368 is an abundant number, since it is smaller than the sum of its proper divisors (398748416).

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

391622368 is a wasteful number, since it uses less digits than its factorization.

391622368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1947 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 391622368 is about 19789.4509271986. The cubic root of 391622368 is about 731.6260544345.

The spelling of 391622368 in words is "three hundred ninety-one million, six hundred twenty-two thousand, three hundred sixty-eight".