397453888 has 56 divisors (see below), whose sum is σ = 851846912. Its totient is φ = 182905344.

The previous prime is 397453807. The next prime is 397453909. The reversal of 397453888 is 888354793.

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, 504631 + ... + 505417.

It is an arithmetic number, because the mean of its divisors is an integer number (15211552).

Almost surely, 2^397453888 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 397453888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425923456).

397453888 is an abundant number, since it is smaller than the sum of its proper divisors (454393024).

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

397453888 is a wasteful number, since it uses less digits than its factorization.

397453888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1409 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The square root of 397453888 is about 19936.2455843622. The cubic root of 397453888 is about 735.2396448109.

The spelling of 397453888 in words is "three hundred ninety-seven million, four hundred fifty-three thousand, eight hundred eighty-eight".