25536140 has 48 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 8697792.

The previous prime is 25536139. The next prime is 25536143. The reversal of 25536140 is 4163552.

It is not an unprimeable number, because it can be changed into a prime (25536143) 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 15 ways as a sum of consecutive naturals, for example, 24551 + ... + 25569.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^25536140 is an apocalyptic number.

25536140 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 25536140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30844800).

25536140 is an abundant number, since it is smaller than the sum of its proper divisors (36153460).

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

25536140 is a wasteful number, since it uses less digits than its factorization.

25536140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25536140 is about 5053.3295954252. The cubic root of 25536140 is about 294.4772509891.

Adding to 25536140 its reverse (4163552), we get a palindrome (29699692).

The spelling of 25536140 in words is "twenty-five million, five hundred thirty-six thousand, one hundred forty".