25280028 has 36 divisors (see below), whose sum is σ = 65632840. Its totient is φ = 8198496.

The previous prime is 25280009. The next prime is 25280033. The reversal of 25280028 is 82008252.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 25279983 and 25280010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8158 + ... + 10821.

Almost surely, 2^25280028 is an apocalyptic number.

It is an amenable number.

25280028 is an abundant number, since it is smaller than the sum of its proper divisors (40352812).

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

25280028 is a wasteful number, since it uses less digits than its factorization.

25280028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19026 (or 19021 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 25280028 is about 5027.9248204403. The cubic root of 25280028 is about 293.4894652054.

The spelling of 25280028 in words is "twenty-five million, two hundred eighty thousand, twenty-eight".