391380902 has 32 divisors (see below), whose sum is σ = 688279680. Its totient is φ = 164926080.

The previous prime is 391380887. The next prime is 391380907. The reversal of 391380902 is 209083193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391380907) 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, 17249 + ... + 32867.

It is an arithmetic number, because the mean of its divisors is an integer number (21508740).

Almost surely, 2^391380902 is an apocalyptic number.

391380902 is a deficient number, since it is larger than the sum of its proper divisors (296898778).

391380902 is a wasteful number, since it uses less digits than its factorization.

391380902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15716.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 391380902 is about 19783.3491097943. The cubic root of 391380902 is about 731.4756551787.

The spelling of 391380902 in words is "three hundred ninety-one million, three hundred eighty thousand, nine hundred two".