561227860 has 24 divisors (see below), whose sum is σ = 1179047016. Its totient is φ = 224401920.

The previous prime is 561227839. The next prime is 561227861. The reversal of 561227860 is 68722165.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25120144 + 536107716 = 5012^2 + 23154^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561227861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73000 + ... + 80320.

It is an arithmetic number, because the mean of its divisors is an integer number (49126959).

Almost surely, 2^561227860 is an apocalyptic number.

It is an amenable number.

561227860 is an abundant number, since it is smaller than the sum of its proper divisors (617819156).

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

561227860 is a wasteful number, since it uses less digits than its factorization.

561227860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11163 (or 11161 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 561227860 is about 23690.2482046938. The cubic root of 561227860 is about 824.8590441766.

The spelling of 561227860 in words is "five hundred sixty-one million, two hundred twenty-seven thousand, eight hundred sixty".