25732880 has 20 divisors (see below), whose sum is σ = 59829132. Its totient is φ = 10293120.

The previous prime is 25732879. The next prime is 25732901. The reversal of 25732880 is 8823752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7311616 + 18421264 = 2704^2 + 4292^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×25732880² = 1324362226188800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25732880.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160751 + ... + 160910.

Almost surely, 2^25732880 is an apocalyptic number.

25732880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25732880 is an abundant number, since it is smaller than the sum of its proper divisors (34096252).

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

25732880 is a wasteful number, since it uses less digits than its factorization.

25732880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321674 (or 321668 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 25732880 is about 5072.7586183456. The cubic root of 25732880 is about 295.2315714991.

The spelling of 25732880 in words is "twenty-five million, seven hundred thirty-two thousand, eight hundred eighty".