25200540 has 72 divisors (see below), whose sum is σ = 76946688. Its totient is φ = 6675840.

The previous prime is 25200491. The next prime is 25200559. The reversal of 25200540 is 4500252.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 34014 + ... + 34746.

It is an arithmetic number, because the mean of its divisors is an integer number (1068704).

Almost surely, 2^25200540 is an apocalyptic number.

25200540 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 25200540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38473344).

25200540 is an abundant number, since it is smaller than the sum of its proper divisors (51746148).

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

25200540 is a wasteful number, since it uses less digits than its factorization.

25200540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25200540 is about 5020.0139442037. The cubic root of 25200540 is about 293.1815358996.

Adding to 25200540 its reverse (4500252), we get a palindrome (29700792).

The spelling of 25200540 in words is "twenty-five million, two hundred thousand, five hundred forty".