561356728 has 32 divisors (see below), whose sum is σ = 1117746000. Its totient is φ = 263388672.

The previous prime is 561356723. The next prime is 561356737. The reversal of 561356728 is 827653165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561356723) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41551 + ... + 53377.

Almost surely, 2^561356728 is an apocalyptic number.

It is an amenable number.

561356728 is a deficient number, since it is larger than the sum of its proper divisors (556389272).

561356728 is a wasteful number, since it uses less digits than its factorization.

561356728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12199 (or 12195 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 561356728 is about 23692.9679018902. The cubic root of 561356728 is about 824.9221734971.

The spelling of 561356728 in words is "five hundred sixty-one million, three hundred fifty-six thousand, seven hundred twenty-eight".