561172284 has 18 divisors (see below), whose sum is σ = 1418518920. Its totient is φ = 187057416.

The previous prime is 561172259. The next prime is 561172291. The reversal of 561172284 is 482271165.

561172284 is a `hidden beast` number, since 561 + 1 + 72 + 28 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 15588119 = 561172284 / (5 + 6 + 1 + 1 + 7 + 2 + 2 + 8 + 4).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7794024 + ... + 7794095.

Almost surely, 2^561172284 is an apocalyptic number.

It is an amenable number.

561172284 is an abundant number, since it is smaller than the sum of its proper divisors (857346636).

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

561172284 is a wasteful number, since it uses less digits than its factorization.

561172284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15588129 (or 15588124 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 561172284 is about 23689.0752035617. The cubic root of 561172284 is about 824.8318158541.

The spelling of 561172284 in words is "five hundred sixty-one million, one hundred seventy-two thousand, two hundred eighty-four".