25525780 has 48 divisors (see below), whose sum is σ = 62770176. Its totient is φ = 8536320.

The previous prime is 25525777. The next prime is 25525781. The reversal of 25525780 is 8752552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3517 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (1307712).

Almost surely, 2^25525780 is an apocalyptic number.

25525780 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 25525780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31385088).

25525780 is an abundant number, since it is smaller than the sum of its proper divisors (37244396).

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

25525780 is a wasteful number, since it uses less digits than its factorization.

25525780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25525780 is about 5052.3044247155. The cubic root of 25525780 is about 294.4374225083.

The spelling of 25525780 in words is "twenty-five million, five hundred twenty-five thousand, seven hundred eighty".