561395028 has 12 divisors (see below), whose sum is σ = 1309921760. Its totient is φ = 187131672.

The previous prime is 561394979. The next prime is 561395047. The reversal of 561395028 is 820593165.

It is a tau number, because it is divible by the number of its divisors (12).

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, 23391448 + ... + 23391471.

Almost surely, 2^561395028 is an apocalyptic number.

It is an amenable number.

561395028 is an abundant number, since it is smaller than the sum of its proper divisors (748526732).

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

561395028 is a wasteful number, since it uses less digits than its factorization.

561395028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46782926 (or 46782924 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 561395028 is about 23693.7761448022. The cubic root of 561395028 is about 824.9409338796.

The spelling of 561395028 in words is "five hundred sixty-one million, three hundred ninety-five thousand, twenty-eight".