397213852 has 24 divisors (see below), whose sum is σ = 794870496. Its totient is φ = 170139648.

The previous prime is 397213837. The next prime is 397213903. The reversal of 397213852 is 258312793.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74508 + ... + 79660.

It is an arithmetic number, because the mean of its divisors is an integer number (33119604).

Almost surely, 2^397213852 is an apocalyptic number.

It is an amenable number.

397213852 is an abundant number, since it is smaller than the sum of its proper divisors (397656644).

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

397213852 is a wasteful number, since it uses less digits than its factorization.

397213852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917 (or 7915 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 397213852 is about 19930.2245847858. The cubic root of 397213852 is about 735.0916028796.

The spelling of 397213852 in words is "three hundred ninety-seven million, two hundred thirteen thousand, eight hundred fifty-two".