25778856 has 32 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 8315520.

The previous prime is 25778833. The next prime is 25778897. The reversal of 25778856 is 65887752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16581 + ... + 18068.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^25778856 is an apocalyptic number.

It is an amenable number.

25778856 is an abundant number, since it is smaller than the sum of its proper divisors (40749144).

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

25778856 is a wasteful number, since it uses less digits than its factorization.

25778856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34689 (or 34685 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 25778856 is about 5077.2882526010. The cubic root of 25778856 is about 295.4072933894.

The spelling of 25778856 in words is "twenty-five million, seven hundred seventy-eight thousand, eight hundred fifty-six".