25280288 has 36 divisors (see below), whose sum is σ = 54714870. Its totient is φ = 11489280.

The previous prime is 25280273. The next prime is 25280327. The reversal of 25280288 is 88208252.

It can be written as a sum of positive squares in only one way, i.e., 24720784 + 559504 = 4972^2 + 748^2 .

It is a super-2 number, since 2×25280288² = 1278185922725888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 608 + ... + 7136.

Almost surely, 2^25280288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25280288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27357435).

25280288 is an abundant number, since it is smaller than the sum of its proper divisors (29434582).

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

25280288 is a wasteful number, since it uses less digits than its factorization.

25280288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561 (or 6542 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 25280288 is about 5027.9506759713. The cubic root of 25280288 is about 293.4904713620.

The spelling of 25280288 in words is "twenty-five million, two hundred eighty thousand, two hundred eighty-eight".