391394934 has 48 divisors (see below), whose sum is σ = 970388640. Its totient is φ = 111686400.

The previous prime is 391394923. The next prime is 391394947. The reversal of 391394934 is 439493193.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 391394934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138334 + ... + 141134.

It is an arithmetic number, because the mean of its divisors is an integer number (20216430).

Almost surely, 2^391394934 is an apocalyptic number.

391394934 is an abundant number, since it is smaller than the sum of its proper divisors (578993706).

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

391394934 is a wasteful number, since it uses less digits than its factorization.

391394934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925 (or 3922 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 391394934 is about 19783.7037482874. The cubic root of 391394934 is about 731.4843968280.

The spelling of 391394934 in words is "three hundred ninety-one million, three hundred ninety-four thousand, nine hundred thirty-four".