25587240 has 128 divisors (see below), whose sum is σ = 89026560. Its totient is φ = 5762304.

The previous prime is 25587217. The next prime is 25587241. The reversal of 25587240 is 4278552.

It is not an unprimeable number, because it can be changed into a prime (25587241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69537 + ... + 69903.

It is an arithmetic number, because the mean of its divisors is an integer number (695520).

Almost surely, 2^25587240 is an apocalyptic number.

25587240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25587240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44513280).

25587240 is an abundant number, since it is smaller than the sum of its proper divisors (63439320).

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

25587240 is a wasteful number, since it uses less digits than its factorization.

25587240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 25587240 is about 5058.3831408860. The cubic root of 25587240 is about 294.6735448347.

The spelling of 25587240 in words is "twenty-five million, five hundred eighty-seven thousand, two hundred forty".