25870856 has 32 divisors (see below), whose sum is σ = 55706400. Its totient is φ = 11139840.

The previous prime is 25870853. The next prime is 25870861. The reversal of 25870856 is 65807852.

It is not an unprimeable number, because it can be changed into a prime (25870853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6065 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (1740825).

Almost surely, 2^25870856 is an apocalyptic number.

It is an amenable number.

25870856 is an abundant number, since it is smaller than the sum of its proper divisors (29835544).

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

25870856 is a wasteful number, since it uses less digits than its factorization.

25870856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15509 (or 15505 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 25870856 is about 5086.3401380560. The cubic root of 25870856 is about 295.7582942830.

The spelling of 25870856 in words is "twenty-five million, eight hundred seventy thousand, eight hundred fifty-six".