391092402 has 16 divisors (see below), whose sum is σ = 789930432. Its totient is φ = 129073200.

The previous prime is 391092389. The next prime is 391092413. The reversal of 391092402 is 204290193.

It is a self number, because there is not a number n which added to its sum of digits gives 391092402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322078 + ... + 323289.

It is an arithmetic number, because the mean of its divisors is an integer number (49370652).

Almost surely, 2^391092402 is an apocalyptic number.

391092402 is an abundant number, since it is smaller than the sum of its proper divisors (398838030).

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

391092402 is a wasteful number, since it uses less digits than its factorization.

391092402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645473.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 391092402 is about 19776.0562802597. The cubic root of 391092402 is about 731.2958792458.

The spelling of 391092402 in words is "three hundred ninety-one million, ninety-two thousand, four hundred two".