402397072 has 80 divisors (see below), whose sum is σ = 1029255552. Its totient is φ = 147548160.

The previous prime is 402397063. The next prime is 402397091. The reversal of 402397072 is 270793204.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11338 + ... + 30550.

Almost surely, 2^402397072 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 402397072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514627776).

402397072 is an abundant number, since it is smaller than the sum of its proper divisors (626858480).

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

402397072 is a wasteful number, since it uses less digits than its factorization.

402397072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19256 (or 19250 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 402397072 is about 20059.8372874757. The cubic root of 402397072 is about 738.2751842310.

The spelling of 402397072 in words is "four hundred two million, three hundred ninety-seven thousand, seventy-two".