397556424 has 160 divisors (see below), whose sum is σ = 1191801600. Its totient is φ = 123379200.

The previous prime is 397556417. The next prime is 397556443. The reversal of 397556424 is 424655793.

397556424 is a `hidden beast` number, since 3 + 97 + 556 + 4 + 2 + 4 = 666.

It is a super-2 number, since 2×397556424² = 316102220527335552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397556424.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1663297 + ... + 1663535.

It is an arithmetic number, because the mean of its divisors is an integer number (7448760).

Almost surely, 2^397556424 is an apocalyptic number.

397556424 is a gapful number since it is divisible by the number (34) 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 397556424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595900800).

397556424 is an abundant number, since it is smaller than the sum of its proper divisors (794245176).

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

397556424 is a wasteful number, since it uses less digits than its factorization.

397556424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 412 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 397556424 is about 19938.8170160619. The cubic root of 397556424 is about 735.3028656041.

The spelling of 397556424 in words is "three hundred ninety-seven million, five hundred fifty-six thousand, four hundred twenty-four".