25885530 has 72 divisors (see below), whose sum is σ = 74008116. Its totient is φ = 6272640.

The previous prime is 25885529. The next prime is 25885537. The reversal of 25885530 is 3558852.

25885530 is a `hidden beast` number, since 25 + 88 + 553 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25492401 + 393129 = 5049^2 + 627^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25885537) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9702 + ... + 12078.

Almost surely, 2^25885530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25885530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37004058).

25885530 is an abundant number, since it is smaller than the sum of its proper divisors (48122586).

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

25885530 is a wasteful number, since it uses less digits than its factorization.

25885530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 25885530 is about 5087.7824245933. The cubic root of 25885530 is about 295.8142019412.

It can be divided in two parts, 2588 and 5530, that added together give a palindrome (8118).

The spelling of 25885530 in words is "twenty-five million, eight hundred eighty-five thousand, five hundred thirty".