25799520 has 96 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 6755840.

The previous prime is 25799513. The next prime is 25799551. The reversal of 25799520 is 2599752.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27865 + ... + 28775.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^25799520 is an apocalyptic number.

25799520 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 25799520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41368320).

25799520 is an abundant number, since it is smaller than the sum of its proper divisors (56937120).

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

25799520 is a wasteful number, since it uses less digits than its factorization.

25799520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 25799520 is about 5079.3227895065. The cubic root of 25799520 is about 295.4862038732.

The spelling of 25799520 in words is "twenty-five million, seven hundred ninety-nine thousand, five hundred twenty".