25280928 has 72 divisors (see below), whose sum is σ = 73680516. Its totient is φ = 8217600.

The previous prime is 25280923. The next prime is 25280939. The reversal of 25280928 is 82908252.

It can be written as a sum of positive squares in 2 ways, for example, as 25280784 + 144 = 5028^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25280892 and 25280901.

It is not an unprimeable number, because it can be changed into a prime (25280923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10738 + ... + 12878.

Almost surely, 2^25280928 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 25280928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36840258).

25280928 is an abundant number, since it is smaller than the sum of its proper divisors (48399588).

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

25280928 is a wasteful number, since it uses less digits than its factorization.

25280928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 25280928 is about 5028.0143197887. The cubic root of 25280928 is about 293.4929480257.

It can be divided in two parts, 2528092 and 8, that added together give a square (2528100 = 1590²).

The spelling of 25280928 in words is "twenty-five million, two hundred eighty thousand, nine hundred twenty-eight".