25280768 has 72 divisors (see below), whose sum is σ = 55224792. Its totient is φ = 11501568.

The previous prime is 25280767. The next prime is 25280789. The reversal of 25280768 is 86708252.

It can be written as a sum of positive squares in 4 ways, for example, as 9535744 + 15745024 = 3088^2 + 3968^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25280767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160946 + ... + 161102.

It is an arithmetic number, because the mean of its divisors is an integer number (767011).

Almost surely, 2^25280768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25280768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27612396).

25280768 is an abundant number, since it is smaller than the sum of its proper divisors (29944024).

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

25280768 is a wasteful number, since it uses less digits than its factorization.

25280768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 25280768 is about 5027.9984089099. The cubic root of 25280768 is about 293.4923288637.

The spelling of 25280768 in words is "twenty-five million, two hundred eighty thousand, seven hundred sixty-eight".