397415328 has 48 divisors (see below), whose sum is σ = 1047434976. Its totient is φ = 131936000.

The previous prime is 397415281. The next prime is 397415351. The reversal of 397415328 is 823514793.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 397415328.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15850 + ... + 32342.

It is an arithmetic number, because the mean of its divisors is an integer number (21821562).

Almost surely, 2^397415328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397415328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523717488).

397415328 is an abundant number, since it is smaller than the sum of its proper divisors (650019648).

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

397415328 is a wasteful number, since it uses less digits than its factorization.

397415328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16757 (or 16749 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 397415328 is about 19935.2784781151. The cubic root of 397415328 is about 735.2158669938.

The spelling of 397415328 in words is "three hundred ninety-seven million, four hundred fifteen thousand, three hundred twenty-eight".