402400004 has 12 divisors (see below), whose sum is σ = 705135564. Its totient is φ = 200932704.

The previous prime is 402399997. The next prime is 402400039. The reversal of 402400004 is 400004204.

It can be written as a sum of positive squares in 2 ways, for example, as 325802500 + 76597504 = 18050^2 + 8752^2 .

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, 63419 + ... + 69474.

It is an arithmetic number, because the mean of its divisors is an integer number (58761297).

Almost surely, 2^402400004 is an apocalyptic number.

It is an amenable number.

402400004 is a deficient number, since it is larger than the sum of its proper divisors (302735560).

402400004 is a wasteful number, since it uses less digits than its factorization.

402400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133654 (or 133652 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402400004 is about 20059.9103686931. The cubic root of 402400004 is about 738.2769773335.

Adding to 402400004 its reverse (400004204), we get a palindrome (802404208).

The spelling of 402400004 in words is "four hundred two million, four hundred thousand, four".