397257834 has 16 divisors (see below), whose sum is σ = 821913120. Its totient is φ = 127853040.

The previous prime is 397257829. The next prime is 397257857. The reversal of 397257834 is 438752793.

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, 1141372 + ... + 1141719.

It is an arithmetic number, because the mean of its divisors is an integer number (51369570).

Almost surely, 2^397257834 is an apocalyptic number.

397257834 is an abundant number, since it is smaller than the sum of its proper divisors (424655286).

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

397257834 is a wasteful number, since it uses less digits than its factorization.

397257834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283125.

The product of its digits is 1270080, while the sum is 48.

The square root of 397257834 is about 19931.3279537516. The cubic root of 397257834 is about 735.1187331903.

The spelling of 397257834 in words is "three hundred ninety-seven million, two hundred fifty-seven thousand, eight hundred thirty-four".