397651968 has 312 divisors, whose sum is σ = 1390242048. Its totient is φ = 107053056.

The previous prime is 397651963. The next prime is 397651979. The reversal of 397651968 is 869156793.

397651968 is a `hidden beast` number, since 397 + 65 + 196 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (397651963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5935071 + ... + 5935137.

It is an arithmetic number, because the mean of its divisors is an integer number (4455904).

Almost surely, 2^397651968 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 397651968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695121024).

397651968 is an abundant number, since it is smaller than the sum of its proper divisors (992590080).

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

397651968 is a wasteful number, since it uses less digits than its factorization.

397651968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 102 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 397651968 is about 19941.2128016327. The cubic root of 397651968 is about 735.3617655451.

The spelling of 397651968 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, nine hundred sixty-eight".