402396424 has 8 divisors (see below), whose sum is σ = 754493310. Its totient is φ = 201198208.

The previous prime is 402396389. The next prime is 402396433. The reversal of 402396424 is 424693204.

It can be written as a sum of positive squares in only one way, i.e., 216619524 + 185776900 = 14718^2 + 13630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 402396424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25149769 + ... + 25149784.

Almost surely, 2^402396424 is an apocalyptic number.

It is an amenable number.

402396424 is a deficient number, since it is larger than the sum of its proper divisors (352096886).

402396424 is a wasteful number, since it uses less digits than its factorization.

402396424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50299559 (or 50299555 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 402396424 is about 20059.8211357928. The cubic root of 402396424 is about 738.2747879371.

The spelling of 402396424 in words is "four hundred two million, three hundred ninety-six thousand, four hundred twenty-four".