397523844 has 27 divisors (see below), whose sum is σ = 1005154423. Its totient is φ = 132468072.

The previous prime is 397523839. The next prime is 397523849. The reversal of 397523844 is 448325793.

The square root of 397523844 is 19938.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (397523839) and next prime (397523849).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397523844.

It is not an unprimeable number, because it can be changed into a prime (397523849) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 117967 + ... + 121289.

Almost surely, 2^397523844 is an apocalyptic number.

397523844 is the 19938-th square number.

It is an amenable number.

397523844 is an abundant number, since it is smaller than the sum of its proper divisors (607630579).

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

397523844 is an equidigital number, since it uses as much as digits as its factorization.

397523844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656 (or 3328 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The cubic root of 397523844 is about 735.2827788773.

The spelling of 397523844 in words is "three hundred ninety-seven million, five hundred twenty-three thousand, eight hundred forty-four".