391386700842 has 32 divisors (see below), whose sum is σ = 789750964224. Its totient is φ = 129301426800.

The previous prime is 391386700823. The next prime is 391386700843. The reversal of 391386700842 is 248007683193.

It is not an unprimeable number, because it can be changed into a prime (391386700843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475417 + ... + 1004387.

It is an arithmetic number, because the mean of its divisors is an integer number (24679717632).

Almost surely, 2^391386700842 is an apocalyptic number.

391386700842 is an abundant number, since it is smaller than the sum of its proper divisors (398364263382).

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

391386700842 is a wasteful number, since it uses less digits than its factorization.

391386700842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530074.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 391386700842 in words is "three hundred ninety-one billion, three hundred eighty-six million, seven hundred thousand, eight hundred forty-two".