88872561 has 12 divisors (see below), whose sum is σ = 128548420. Its totient is φ = 59166720.

The previous prime is 88872533. The next prime is 88872571. The reversal of 88872561 is 16527888.

88872561 is a `hidden beast` number, since 8 + 8 + 87 + 2 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38192400 + 50680161 = 6180^2 + 7119^2 .

It is not a de Polignac number, because 88872561 - 2¹¹ = 88870513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88872521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501 + ... + 13341.

Almost surely, 2^88872561 is an apocalyptic number.

It is an amenable number.

88872561 is a deficient number, since it is larger than the sum of its proper divisors (39675859).

88872561 is a wasteful number, since it uses less digits than its factorization.

88872561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13616 (or 13613 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 88872561 is about 9427.2244589805. The cubic root of 88872561 is about 446.2613056477.

The spelling of 88872561 in words is "eighty-eight million, eight hundred seventy-two thousand, five hundred sixty-one".