25304864 has 48 divisors (see below), whose sum is σ = 54613440. Its totient is φ = 11470080.

The previous prime is 25304863. The next prime is 25304869. The reversal of 25304864 is 46840352.

It is a super-2 number, since 2×25304864² = 1280672284116992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 25304864.

It is not an unprimeable number, because it can be changed into a prime (25304861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24029 + ... + 25059.

It is an arithmetic number, because the mean of its divisors is an integer number (1137780).

Almost surely, 2^25304864 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 25304864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27306720).

25304864 is an abundant number, since it is smaller than the sum of its proper divisors (29308576).

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

25304864 is a wasteful number, since it uses less digits than its factorization.

25304864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 25304864 is about 5030.3940203527. The cubic root of 25304864 is about 293.5855452498.

The spelling of 25304864 in words is "twenty-five million, three hundred four thousand, eight hundred sixty-four".