25481568 has 72 divisors (see below), whose sum is σ = 77824152. Its totient is φ = 7279104.

The previous prime is 25481557. The next prime is 25481587. The reversal of 25481568 is 86518452.

It is a congruent number.

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, 1996 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (1080891).

Almost surely, 2^25481568 is an apocalyptic number.

25481568 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 25481568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38912076).

25481568 is an abundant number, since it is smaller than the sum of its proper divisors (52342584).

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

25481568 is a wasteful number, since it uses less digits than its factorization.

25481568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444 (or 5429 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 25481568 is about 5047.9270993151. The cubic root of 25481568 is about 294.2673305421.

The spelling of 25481568 in words is "twenty-five million, four hundred eighty-one thousand, five hundred sixty-eight".