397021464 has 96 divisors (see below), whose sum is σ = 1268567040. Its totient is φ = 109771200.

The previous prime is 397021441. The next prime is 397021483. The reversal of 397021464 is 464120793.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2919 + ... + 28329.

It is an arithmetic number, because the mean of its divisors is an integer number (13214240).

Almost surely, 2^397021464 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 397021464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634283520).

397021464 is an abundant number, since it is smaller than the sum of its proper divisors (871545576).

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

397021464 is a wasteful number, since it uses less digits than its factorization.

397021464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25461 (or 25454 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 397021464 is about 19925.3974615314. The cubic root of 397021464 is about 734.9729047349.

The spelling of 397021464 in words is "three hundred ninety-seven million, twenty-one thousand, four hundred sixty-four".