402288464 has 20 divisors (see below), whose sum is σ = 806311860. Its totient is φ = 194208000.

The previous prime is 402288451. The next prime is 402288511. The reversal of 402288464 is 464882204.

It can be written as a sum of positive squares in 2 ways, for example, as 308353600 + 93934864 = 17560^2 + 9692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433037 + ... + 433964.

It is an arithmetic number, because the mean of its divisors is an integer number (40315593).

Almost surely, 2^402288464 is an apocalyptic number.

It is an amenable number.

402288464 is an abundant number, since it is smaller than the sum of its proper divisors (404023396).

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

402288464 is a wasteful number, since it uses less digits than its factorization.

402288464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867038 (or 867032 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 38.

The square root of 402288464 is about 20057.1300040659. The cubic root of 402288464 is about 738.2087574670.

The spelling of 402288464 in words is "four hundred two million, two hundred eighty-eight thousand, four hundred sixty-four".