25478816 has 24 divisors (see below), whose sum is σ = 54722304. Its totient is φ = 11581120.

The previous prime is 25478809. The next prime is 25478821. The reversal of 25478816 is 61887452.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35840 + ... + 36543.

It is an arithmetic number, because the mean of its divisors is an integer number (2280096).

Almost surely, 2^25478816 is an apocalyptic number.

It is an amenable number.

25478816 is an abundant number, since it is smaller than the sum of its proper divisors (29243488).

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

25478816 is a wasteful number, since it uses less digits than its factorization.

25478816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72404 (or 72396 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 25478816 is about 5047.6545048171. The cubic root of 25478816 is about 294.2567365728.

The spelling of 25478816 in words is "twenty-five million, four hundred seventy-eight thousand, eight hundred sixteen".