25749880 has 64 divisors (see below), whose sum is σ = 65136960. Its totient is φ = 9090048.

The previous prime is 25749863. The next prime is 25749907. The reversal of 25749880 is 8894752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10884 + ... + 13036.

It is an arithmetic number, because the mean of its divisors is an integer number (1017765).

Almost surely, 2^25749880 is an apocalyptic number.

25749880 is a gapful number since it is divisible by the number (20) 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 25749880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32568480).

25749880 is an abundant number, since it is smaller than the sum of its proper divisors (39387080).

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

25749880 is a wasteful number, since it uses less digits than its factorization.

25749880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2196 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 25749880 is about 5074.4339585810. The cubic root of 25749880 is about 295.2965704667.

The spelling of 25749880 in words is "twenty-five million, seven hundred forty-nine thousand, eight hundred eighty".