25280280 has 48 divisors (see below), whose sum is σ = 82162080. Its totient is φ = 6741312.

The previous prime is 25280273. The next prime is 25280327. The reversal of 25280280 is 8208252.

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, 34752 + ... + 35471.

It is an arithmetic number, because the mean of its divisors is an integer number (1711710).

Almost surely, 2^25280280 is an apocalyptic number.

25280280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25280280 is an abundant number, since it is smaller than the sum of its proper divisors (56881800).

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

25280280 is a wasteful number, since it uses less digits than its factorization.

25280280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70240 (or 70233 counting only the distinct ones).

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

The square root of 25280280 is about 5027.9498804185. The cubic root of 25280280 is about 293.4904404035.

The spelling of 25280280 in words is "twenty-five million, two hundred eighty thousand, two hundred eighty".