25870816 has 24 divisors (see below), whose sum is σ = 51105600. Its totient is φ = 12891648.

The previous prime is 25870783. The next prime is 25870829. The reversal of 25870816 is 61807852.

It is a congruent number.

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, 9585 + ... + 11983.

It is an arithmetic number, because the mean of its divisors is an integer number (2129400).

Almost surely, 2^25870816 is an apocalyptic number.

It is an amenable number.

25870816 is a deficient number, since it is larger than the sum of its proper divisors (25234784).

25870816 is a wasteful number, since it uses less digits than its factorization.

25870816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 25870816 is about 5086.3362059541. The cubic root of 25870816 is about 295.7581418549.

The spelling of 25870816 in words is "twenty-five million, eight hundred seventy thousand, eight hundred sixteen".