561498872 has 16 divisors (see below), whose sum is σ = 1148520600. Its totient is φ = 255226720.

The previous prime is 561498863. The next prime is 561498983. The reversal of 561498872 is 278894165.

It is a self number, because there is not a number n which added to its sum of digits gives 561498872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190247 + ... + 3190422.

Almost surely, 2^561498872 is an apocalyptic number.

It is an amenable number.

561498872 is an abundant number, since it is smaller than the sum of its proper divisors (587021728).

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

561498872 is a wasteful number, since it uses less digits than its factorization.

561498872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380686 (or 6380682 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 561498872 is about 23695.9674206393. The cubic root of 561498872 is about 824.9917952046.

The spelling of 561498872 in words is "five hundred sixty-one million, four hundred ninety-eight thousand, eight hundred seventy-two".