561406404 has 48 divisors (see below), whose sum is σ = 1456232960. Its totient is φ = 167166720.

The previous prime is 561406397. The next prime is 561406411. The reversal of 561406404 is 404604165.

It is an interprime number because it is at equal distance from previous prime (561406397) and next prime (561406411).

It is a super-2 number, since 2×561406404² = 630354300904422432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53209 + ... + 62880.

Almost surely, 2^561406404 is an apocalyptic number.

It is an amenable number.

561406404 is an abundant number, since it is smaller than the sum of its proper divisors (894826556).

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

561406404 is a wasteful number, since it uses less digits than its factorization.

561406404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116140 (or 116138 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 561406404 is about 23694.0162066290. The cubic root of 561406404 is about 824.9465059897.

The spelling of 561406404 in words is "five hundred sixty-one million, four hundred six thousand, four hundred four".