397072896 has 160 divisors (see below), whose sum is σ = 1173782016. Its totient is φ = 118272000.

The previous prime is 397072853. The next prime is 397072903. The reversal of 397072896 is 698270793.

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 15 ways as a sum of consecutive naturals, for example, 1199451 + ... + 1199781.

Almost surely, 2^397072896 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 397072896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586891008).

397072896 is an abundant number, since it is smaller than the sum of its proper divisors (776709120).

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

397072896 is a wasteful number, since it uses less digits than its factorization.

397072896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 397072896 is about 19926.6880338906. The cubic root of 397072896 is about 735.0046406297.

The spelling of 397072896 in words is "three hundred ninety-seven million, seventy-two thousand, eight hundred ninety-six".