396734990 has 16 divisors (see below), whose sum is σ = 729317952. Its totient is φ = 155317344.

The previous prime is 396734971. The next prime is 396735011. The reversal of 396734990 is 99437693.

It is a happy number.

It is a congruent number.

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, 421589 + ... + 422528.

It is an arithmetic number, because the mean of its divisors is an integer number (45582372).

Almost surely, 2^396734990 is an apocalyptic number.

396734990 is a deficient number, since it is larger than the sum of its proper divisors (332582962).

396734990 is a wasteful number, since it uses less digits than its factorization.

396734990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844171.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The square root of 396734990 is about 19918.2074996723. The cubic root of 396734990 is about 734.7960870153.

The spelling of 396734990 in words is "three hundred ninety-six million, seven hundred thirty-four thousand, nine hundred ninety".