25989904 has 40 divisors (see below), whose sum is σ = 52893440. Its totient is φ = 12355200.

The previous prime is 25989883. The next prime is 25989917. The reversal of 25989904 is 40998952.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29827 + ... + 30685.

It is an arithmetic number, because the mean of its divisors is an integer number (1322336).

Almost surely, 2^25989904 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 25989904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26446720).

25989904 is an abundant number, since it is smaller than the sum of its proper divisors (26903536).

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

25989904 is a wasteful number, since it uses less digits than its factorization.

25989904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 25989904 is about 5098.0294232183. The cubic root of 25989904 is about 296.2112565427.

The spelling of 25989904 in words is "twenty-five million, nine hundred eighty-nine thousand, nine hundred four".