2561288 has 32 divisors (see below), whose sum is σ = 5232600. Its totient is φ = 1170432.

The previous prime is 2561269. The next prime is 2561291. The reversal of 2561288 is 8821652.

It can be written as a sum of positive squares in 4 ways, for example, as 2502724 + 58564 = 1582^2 + 242^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4778 + ... + 5286.

2^2561288 is an apocalyptic number.

It is an amenable number.

2561288 is an abundant number, since it is smaller than the sum of its proper divisors (2671312).

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

2561288 is a wasteful number, since it uses less digits than its factorization.

2561288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 565 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 2561288 is about 1600.4024493858. The cubic root of 2561288 is about 136.8210140649.

The spelling of 2561288 in words is "two million, five hundred sixty-one thousand, two hundred eighty-eight".