25200720 has 100 divisors (see below), whose sum is σ = 87548340. Its totient is φ = 6718464.

The previous prime is 25200719. The next prime is 25200743. The reversal of 25200720 is 2700252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13749264 + 11451456 = 3708^2 + 3384^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25200693 and 25200702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4536 + ... + 8424.

Almost surely, 2^25200720 is an apocalyptic number.

25200720 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 25200720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43774170).

25200720 is an abundant number, since it is smaller than the sum of its proper divisors (62347620).

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

25200720 is a wasteful number, since it uses less digits than its factorization.

25200720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 25200720 is about 5020.0318724088. The cubic root of 25200720 is about 293.1822339342.

Adding to 25200720 its reverse (2700252), we get a palindrome (27900972).

The spelling of 25200720 in words is "twenty-five million, two hundred thousand, seven hundred twenty".