561002856 has 32 divisors (see below), whose sum is σ = 1485008640. Its totient is φ = 176000768.

The previous prime is 561002809. The next prime is 561002863. The reversal of 561002856 is 658200165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687096 + ... + 687911.

It is an arithmetic number, because the mean of its divisors is an integer number (46406520).

Almost surely, 2^561002856 is an apocalyptic number.

It is an amenable number.

561002856 is an abundant number, since it is smaller than the sum of its proper divisors (924005784).

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

561002856 is a wasteful number, since it uses less digits than its factorization.

561002856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375033 (or 1375029 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 561002856 is about 23685.4988547845. The cubic root of 561002856 is about 824.7487969812.

The spelling of 561002856 in words is "five hundred sixty-one million, two thousand, eight hundred fifty-six".