25191488 has 84 divisors (see below), whose sum is σ = 60373260. Its totient is φ = 10386432.

The previous prime is 25191469. The next prime is 25191503. The reversal of 25191488 is 88419152.

It can be written as a sum of positive squares in 2 ways, for example, as 8479744 + 16711744 = 2912^2 + 4088^2 .

It is a super-2 number, since 2×25191488² = 1269222135308288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90806 + ... + 91082.

Almost surely, 2^25191488 is an apocalyptic number.

25191488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25191488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30186630).

25191488 is an abundant number, since it is smaller than the sum of its proper divisors (35181772).

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

25191488 is a wasteful number, since it uses less digits than its factorization.

25191488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 315 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The square root of 25191488 is about 5019.1122721055. The cubic root of 25191488 is about 293.1464282248.

The spelling of 25191488 in words is "twenty-five million, one hundred ninety-one thousand, four hundred eighty-eight".