25986816 has 54 divisors (see below), whose sum is σ = 74933040. Its totient is φ = 8661504.

The previous prime is 25986809. The next prime is 25986827. The reversal of 25986816 is 61868952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3336 + ... + 7943.

Almost surely, 2^25986816 is an apocalyptic number.

It is an amenable number.

25986816 is an abundant number, since it is smaller than the sum of its proper divisors (48946224).

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

25986816 is a wasteful number, since it uses less digits than its factorization.

25986816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11301 (or 11284 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 25986816 is about 5097.7265521014. The cubic root of 25986816 is about 296.1995245949.

The spelling of 25986816 in words is "twenty-five million, nine hundred eighty-six thousand, eight hundred sixteen".