561575400 has 96 divisors (see below), whose sum is σ = 1832546400. Its totient is φ = 141868800.

The previous prime is 561575387. The next prime is 561575407. The reversal of 561575400 is 4575165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561575407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13231 + ... + 36030.

It is an arithmetic number, because the mean of its divisors is an integer number (19089025).

Almost surely, 2^561575400 is an apocalyptic number.

561575400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561575400 is an abundant number, since it is smaller than the sum of its proper divisors (1270971000).

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

561575400 is a wasteful number, since it uses less digits than its factorization.

561575400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49299 (or 49290 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 561575400 is about 23697.5821551482. The cubic root of 561575400 is about 825.0292735251.

The spelling of 561575400 in words is "five hundred sixty-one million, five hundred seventy-five thousand, four hundred".