25825590 has 48 divisors (see below), whose sum is σ = 76740768. Its totient is φ = 5902848.

The previous prime is 25825549. The next prime is 25825609. The reversal of 25825590 is 9552852.

25825590 is a `hidden beast` number, since 25 + 82 + 559 + 0 = 666.

It is a super-2 number, since 2×25825590² = 1333922197696200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19867 + ... + 21126.

It is an arithmetic number, because the mean of its divisors is an integer number (1598766).

Almost surely, 2^25825590 is an apocalyptic number.

25825590 is an abundant number, since it is smaller than the sum of its proper divisors (50915178).

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

25825590 is a wasteful number, since it uses less digits than its factorization.

25825590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41013 (or 41010 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 25825590 is about 5081.8884285273. Note that the first 3 decimals coincide. The cubic root of 25825590 is about 295.5856983870.

The spelling of 25825590 in words is "twenty-five million, eight hundred twenty-five thousand, five hundred ninety".