25724868 has 48 divisors (see below), whose sum is σ = 65310336. Its totient is φ = 7833600.

The previous prime is 25724861. The next prime is 25724887. The reversal of 25724868 is 86842752.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25724861) 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, 15268 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (1360632).

Almost surely, 2^25724868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25724868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32655168).

25724868 is an abundant number, since it is smaller than the sum of its proper divisors (39585468).

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

25724868 is a wasteful number, since it uses less digits than its factorization.

25724868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724 (or 1722 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 25724868 is about 5071.9688484848. The cubic root of 25724868 is about 295.2009279427.

The spelling of 25724868 in words is "twenty-five million, seven hundred twenty-four thousand, eight hundred sixty-eight".