391485716 has 12 divisors (see below), whose sum is σ = 690029760. Its totient is φ = 194334360.

The previous prime is 391485697. The next prime is 391485727. The reversal of 391485716 is 617584193.

It is a super-2 number, since 2×391485716² = 306522131664065312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351500 + ... + 352611.

It is an arithmetic number, because the mean of its divisors is an integer number (57502480).

Almost surely, 2^391485716 is an apocalyptic number.

It is an amenable number.

391485716 is a deficient number, since it is larger than the sum of its proper divisors (298544044).

391485716 is a wasteful number, since it uses less digits than its factorization.

391485716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704254 (or 704252 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 391485716 is about 19785.9979783684. The cubic root of 391485716 is about 731.5409471111.

The spelling of 391485716 in words is "three hundred ninety-one million, four hundred eighty-five thousand, seven hundred sixteen".