397456956 has 120 divisors (see below), whose sum is σ = 1126984320. Its totient is φ = 121419648.

The previous prime is 397456949. The next prime is 397456973. The reversal of 397456956 is 659654793.

397456956 is a `hidden beast` number, since 3 + 9 + 74 + 569 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 829525 + ... + 830003.

It is an arithmetic number, because the mean of its divisors is an integer number (9391536).

Almost surely, 2^397456956 is an apocalyptic number.

397456956 is a gapful number since it is divisible by the number (36) 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 397456956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563492160).

397456956 is an abundant number, since it is smaller than the sum of its proper divisors (729527364).

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

397456956 is a wasteful number, since it uses less digits than its factorization.

397456956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 694 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 54.

The square root of 397456956 is about 19936.3225294937. The cubic root of 397456956 is about 735.2415366106.

The spelling of 397456956 in words is "three hundred ninety-seven million, four hundred fifty-six thousand, nine hundred fifty-six".