25856900 has 18 divisors (see below), whose sum is σ = 56109690. Its totient is φ = 10342720.

The previous prime is 25856879. The next prime is 25856921. The reversal of 25856900 is 965852.

It is an interprime number because it is at equal distance from previous prime (25856879) and next prime (25856921).

It can be written as a sum of positive squares in 3 ways, for example, as 293764 + 25563136 = 542^2 + 5056^2 .

It is a super-2 number, since 2×25856900² = 1337158555220000, which contains 22 as substring.

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, 129185 + ... + 129384.

It is an arithmetic number, because the mean of its divisors is an integer number (3117205).

Almost surely, 2^25856900 is an apocalyptic number.

25856900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25856900 is an abundant number, since it is smaller than the sum of its proper divisors (30252790).

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

25856900 is a wasteful number, since it uses less digits than its factorization.

25856900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258583 (or 258576 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 25856900 is about 5084.9680431641. The cubic root of 25856900 is about 295.7051025733.

The spelling of 25856900 in words is "twenty-five million, eight hundred fifty-six thousand, nine hundred".