25781288 has 24 divisors (see below), whose sum is σ = 52347150. Its totient is φ = 11898432.

The previous prime is 25781281. The next prime is 25781297. The reversal of 25781288 is 88218752.

It can be written as a sum of positive squares in 3 ways, for example, as 21362884 + 4418404 = 4622^2 + 2102^2 .

It is not an unprimeable number, because it can be changed into a prime (25781281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8183 + ... + 10886.

Almost surely, 2^25781288 is an apocalyptic number.

It is an amenable number.

25781288 is an abundant number, since it is smaller than the sum of its proper divisors (26565862).

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

25781288 is a wasteful number, since it uses less digits than its factorization.

25781288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19101 (or 19084 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The square root of 25781288 is about 5077.5277448774. The cubic root of 25781288 is about 295.4165827588.

The spelling of 25781288 in words is "twenty-five million, seven hundred eighty-one thousand, two hundred eighty-eight".