397939926 has 8 divisors (see below), whose sum is σ = 795879864. Its totient is φ = 132646640.

The previous prime is 397939907. The next prime is 397939939. The reversal of 397939926 is 629939793.

It is a sphenic number, since it is the product of 3 distinct primes.

397939926 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33161655 + ... + 33161666.

It is an arithmetic number, because the mean of its divisors is an integer number (99484983).

Almost surely, 2^397939926 is an apocalyptic number.

397939926 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397939926 is a wasteful number, since it uses less digits than its factorization.

397939926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66323326.

The product of its digits is 4960116, while the sum is 57.

The square root of 397939926 is about 19948.4316676775. The cubic root of 397939926 is about 735.5392257594.

The spelling of 397939926 in words is "three hundred ninety-seven million, nine hundred thirty-nine thousand, nine hundred twenty-six".