25530904 has 64 divisors (see below), whose sum is σ = 57600000. Its totient is φ = 10378368.

The previous prime is 25530899. The next prime is 25530913. The reversal of 25530904 is 40903552.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128197 + ... + 128395.

It is an arithmetic number, because the mean of its divisors is an integer number (900000).

Almost surely, 2^25530904 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 25530904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28800000).

25530904 is an abundant number, since it is smaller than the sum of its proper divisors (32069096).

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

25530904 is a wasteful number, since it uses less digits than its factorization.

25530904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 25530904 is about 5052.8114946038. The cubic root of 25530904 is about 294.4571228063.

The spelling of 25530904 in words is "twenty-five million, five hundred thirty thousand, nine hundred four".