397247872 has 64 divisors (see below), whose sum is σ = 911831040. Its totient is φ = 168860160.

The previous prime is 397247867. The next prime is 397247897. The reversal of 397247872 is 278742793.

It is a tau number, because it is divible by the number of its divisors (64).

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, 112047 + ... + 115537.

It is an arithmetic number, because the mean of its divisors is an integer number (14247360).

Almost surely, 2^397247872 is an apocalyptic number.

397247872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397247872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455915520).

397247872 is an abundant number, since it is smaller than the sum of its proper divisors (514583168).

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

397247872 is a wasteful number, since it uses less digits than its factorization.

397247872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639 (or 3627 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The square root of 397247872 is about 19931.0780440999. The cubic root of 397247872 is about 735.1125883028.

The spelling of 397247872 in words is "three hundred ninety-seven million, two hundred forty-seven thousand, eight hundred seventy-two".