25799856 has 20 divisors (see below), whose sum is σ = 66649752. Its totient is φ = 8599936.

The previous prime is 25799849. The next prime is 25799861. The reversal of 25799856 is 65899752.

It is a happy number.

It is a super-3 number, since 3×25799856³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25799799 and 25799808.

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 3 ways as a sum of consecutive naturals, for example, 268701 + ... + 268796.

Almost surely, 2^25799856 is an apocalyptic number.

It is an amenable number.

25799856 is an abundant number, since it is smaller than the sum of its proper divisors (40849896).

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

25799856 is a wasteful number, since it uses less digits than its factorization.

25799856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537508 (or 537502 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The square root of 25799856 is about 5079.3558646742. The cubic root of 25799856 is about 295.4874866223.

The spelling of 25799856 in words is "twenty-five million, seven hundred ninety-nine thousand, eight hundred fifty-six".