391346994 has 16 divisors (see below), whose sum is σ = 788326560. Its totient is φ = 129510240.

The previous prime is 391346983. The next prime is 391347037. The reversal of 391346994 is 499643193.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233787 + ... + 235454.

It is an arithmetic number, because the mean of its divisors is an integer number (49270410).

Almost surely, 2^391346994 is an apocalyptic number.

391346994 is an abundant number, since it is smaller than the sum of its proper divisors (396979566).

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

391346994 is a wasteful number, since it uses less digits than its factorization.

391346994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469385.

The product of its digits is 629856, while the sum is 48.

The square root of 391346994 is about 19782.4921079221. The cubic root of 391346994 is about 731.4545303251.

The spelling of 391346994 in words is "three hundred ninety-one million, three hundred forty-six thousand, nine hundred ninety-four".