391901852 has 6 divisors (see below), whose sum is σ = 685828248. Its totient is φ = 195950924.

The previous prime is 391901843. The next prime is 391901863. The reversal of 391901852 is 258109193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48987728 + ... + 48987735.

It is an arithmetic number, because the mean of its divisors is an integer number (114304708).

Almost surely, 2^391901852 is an apocalyptic number.

It is an amenable number.

391901852 is a deficient number, since it is larger than the sum of its proper divisors (293926396).

391901852 is a wasteful number, since it uses less digits than its factorization.

391901852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97975467 (or 97975465 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 391901852 is about 19796.5111067582. The cubic root of 391901852 is about 731.8000563727.

The spelling of 391901852 in words is "three hundred ninety-one million, nine hundred one thousand, eight hundred fifty-two".