25500320 has 48 divisors (see below), whose sum is σ = 61544448. Its totient is φ = 9980160.

The previous prime is 25500283. The next prime is 25500361. The reversal of 25500320 is 2300552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5825 + ... + 9215.

It is an arithmetic number, because the mean of its divisors is an integer number (1282176).

Almost surely, 2^25500320 is an apocalyptic number.

25500320 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 25500320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30772224).

25500320 is an abundant number, since it is smaller than the sum of its proper divisors (36044128).

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

25500320 is a wasteful number, since it uses less digits than its factorization.

25500320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453 (or 3445 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 25500320 is about 5049.7841538030. The cubic root of 25500320 is about 294.3394970579.

Adding to 25500320 its reverse (2300552), we get a palindrome (27800872).

The spelling of 25500320 in words is "twenty-five million, five hundred thousand, three hundred twenty".