25920816 has 80 divisors (see below), whose sum is σ = 71352576. Its totient is φ = 8090368.

The previous prime is 25920803. The next prime is 25920833. The reversal of 25920816 is 61802952.

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, 58291 + ... + 58733.

Almost surely, 2^25920816 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 25920816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35676288).

25920816 is an abundant number, since it is smaller than the sum of its proper divisors (45431760).

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

25920816 is a wasteful number, since it uses less digits than its factorization.

25920816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 25920816 is about 5091.2489626810. The cubic root of 25920816 is about 295.9485544875.

The spelling of 25920816 in words is "twenty-five million, nine hundred twenty thousand, eight hundred sixteen".