397759138 has 16 divisors (see below), whose sum is σ = 682565184. Its totient is φ = 170295120.

The previous prime is 397759123. The next prime is 397759147. The reversal of 397759138 is 831957793.

It is a happy 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, 381 + ... + 28207.

It is an arithmetic number, because the mean of its divisors is an integer number (42660324).

Almost surely, 2^397759138 is an apocalyptic number.

397759138 is a deficient number, since it is larger than the sum of its proper divisors (284806046).

397759138 is a wasteful number, since it uses less digits than its factorization.

397759138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28857.

The product of its digits is 1428840, while the sum is 52.

The square root of 397759138 is about 19943.8997691023. The cubic root of 397759138 is about 735.4278213326.

The spelling of 397759138 in words is "three hundred ninety-seven million, seven hundred fifty-nine thousand, one hundred thirty-eight".