25405888 has 56 divisors (see below), whose sum is σ = 56235600. Its totient is φ = 11317248.

The previous prime is 25405879. The next prime is 25405889. The reversal of 25405888 is 88850452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25405888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20058 + ... + 21286.

Almost surely, 2^25405888 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 25405888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28117800).

25405888 is an abundant number, since it is smaller than the sum of its proper divisors (30829712).

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

25405888 is a wasteful number, since it uses less digits than its factorization.

25405888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 25405888 is about 5040.4253788743. The cubic root of 25405888 is about 293.9757179878.

The spelling of 25405888 in words is "twenty-five million, four hundred five thousand, eight hundred eighty-eight".