397157434 has 16 divisors (see below), whose sum is σ = 633960000. Its totient is φ = 185955264.

The previous prime is 397157413. The next prime is 397157459. The reversal of 397157434 is 434751793.

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, 22584 + ... + 36115.

It is an arithmetic number, because the mean of its divisors is an integer number (39622500).

Almost surely, 2^397157434 is an apocalyptic number.

397157434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

397157434 is a deficient number, since it is larger than the sum of its proper divisors (236802566).

397157434 is a wasteful number, since it uses less digits than its factorization.

397157434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58917.

The product of its digits is 317520, while the sum is 43.

The square root of 397157434 is about 19928.8091465597. The cubic root of 397157434 is about 735.0567984860.

The spelling of 397157434 in words is "three hundred ninety-seven million, one hundred fifty-seven thousand, four hundred thirty-four".