25304280 has 32 divisors (see below), whose sum is σ = 75913200. Its totient is φ = 6747776.

The previous prime is 25304261. The next prime is 25304287. The reversal of 25304280 is 8240352.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25304280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25304287) 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, 105315 + ... + 105554.

Almost surely, 2^25304280 is an apocalyptic number.

25304280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25304280 is an abundant number, since it is smaller than the sum of its proper divisors (50608920).

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

25304280 is a wasteful number, since it uses less digits than its factorization.

25304280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210883 (or 210879 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25304280 is about 5030.3359728750. The cubic root of 25304280 is about 293.5832867212.

The spelling of 25304280 in words is "twenty-five million, three hundred four thousand, two hundred eighty".