397213842 has 32 divisors (see below), whose sum is σ = 812851200. Its totient is φ = 129361808.

The previous prime is 397213837. The next prime is 397213903. The reversal of 397213842 is 248312793.

It is a house number.

It is a self number, because there is not a number n which added to its sum of digits gives 397213842.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55759 + ... + 62477.

It is an arithmetic number, because the mean of its divisors is an integer number (25401600).

Almost surely, 2^397213842 is an apocalyptic number.

397213842 is an abundant number, since it is smaller than the sum of its proper divisors (415637358).

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

397213842 is a wasteful number, since it uses less digits than its factorization.

397213842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950.

The product of its digits is 72576, while the sum is 39.

The square root of 397213842 is about 19930.2243339105. The cubic root of 397213842 is about 735.0915967109.

The spelling of 397213842 in words is "three hundred ninety-seven million, two hundred thirteen thousand, eight hundred forty-two".