400202404 has 18 divisors (see below), whose sum is σ = 814698150. Its totient is φ = 171515232.

The previous prime is 400202399. The next prime is 400202441. The reversal of 400202404 is 404202004.

It can be written as a sum of positive squares in only one way, i.e., 284596900 + 115605504 = 16870^2 + 10752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1020729 + ... + 1021120.

Almost surely, 2^400202404 is an apocalyptic number.

It is an amenable number.

400202404 is an abundant number, since it is smaller than the sum of its proper divisors (414495746).

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

400202404 is a wasteful number, since it uses less digits than its factorization.

400202404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041867 (or 2041858 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400202404 is about 20005.0594600466. The cubic root of 400202404 is about 736.9305558907.

Adding to 400202404 its reverse (404202004), we get a palindrome (804404408).

It can be divided in two parts, 40020 and 2404, that added together give a palindrome (42424).

The spelling of 400202404 in words is "four hundred million, two hundred two thousand, four hundred four".