25745880 has 64 divisors (see below), whose sum is σ = 78024960. Its totient is φ = 6795648.

The previous prime is 25745873. The next prime is 25745887. The reversal of 25745880 is 8854752.

It is an interprime number because it is at equal distance from previous prime (25745873) and next prime (25745887).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25745887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11319 + ... + 13401.

It is an arithmetic number, because the mean of its divisors is an integer number (1219140).

Almost surely, 2^25745880 is an apocalyptic number.

25745880 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 25745880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39012480).

25745880 is an abundant number, since it is smaller than the sum of its proper divisors (52279080).

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

25745880 is a wasteful number, since it uses less digits than its factorization.

25745880 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 89600, while the sum is 39.

The square root of 25745880 is about 5074.0398106440. The cubic root of 25745880 is about 295.2812791663.

The spelling of 25745880 in words is "twenty-five million, seven hundred forty-five thousand, eight hundred eighty".