25881590 has 32 divisors (see below), whose sum is σ = 54964224. Its totient is φ = 8586720.

The previous prime is 25881587. The next prime is 25881593. The reversal of 25881590 is 9518852.

It is an interprime number because it is at equal distance from previous prime (25881587) and next prime (25881593).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25881593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3794 + ... + 8133.

It is an arithmetic number, because the mean of its divisors is an integer number (1717632).

Almost surely, 2^25881590 is an apocalyptic number.

25881590 is an abundant number, since it is smaller than the sum of its proper divisors (29082634).

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

25881590 is a wasteful number, since it uses less digits than its factorization.

25881590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 25881590 is about 5087.3952077660. The cubic root of 25881590 is about 295.7991926922.

The spelling of 25881590 in words is "twenty-five million, eight hundred eighty-one thousand, five hundred ninety".