561264988 has 12 divisors (see below), whose sum is σ = 1008760312. Its totient is φ = 273047760.

The previous prime is 561264967. The next prime is 561265039. The reversal of 561264988 is 889462165.

It is a congruent number.

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, 1896018 + ... + 1896313.

Almost surely, 2^561264988 is an apocalyptic number.

It is an amenable number.

561264988 is a deficient number, since it is larger than the sum of its proper divisors (447495324).

561264988 is a wasteful number, since it uses less digits than its factorization.

561264988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792372 (or 3792370 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The square root of 561264988 is about 23691.0318053056. The cubic root of 561264988 is about 824.8772332780.

The spelling of 561264988 in words is "five hundred sixty-one million, two hundred sixty-four thousand, nine hundred eighty-eight".