391616492 has 12 divisors (see below), whose sum is σ = 715125936. Its totient is φ = 187294800.

The previous prime is 391616479. The next prime is 391616501. The reversal of 391616492 is 294616193.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128259 + ... + 2128442.

It is an arithmetic number, because the mean of its divisors is an integer number (59593828).

Almost surely, 2^391616492 is an apocalyptic number.

It is an amenable number.

391616492 is a deficient number, since it is larger than the sum of its proper divisors (323509444).

391616492 is a wasteful number, since it uses less digits than its factorization.

391616492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256728 (or 4256726 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 391616492 is about 19789.3024637050. The cubic root of 391616492 is about 731.6223952494.

The spelling of 391616492 in words is "three hundred ninety-one million, six hundred sixteen thousand, four hundred ninety-two".