25040280 has 64 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 6581120.

The previous prime is 25040273. The next prime is 25040293. The reversal of 25040280 is 8204052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7051 + ... + 9989.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^25040280 is an apocalyptic number.

25040280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25040280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

25040280 is an abundant number, since it is smaller than the sum of its proper divisors (51164520).

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

25040280 is a wasteful number, since it uses less digits than its factorization.

25040280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024 (or 3020 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 25040280 is about 5004.0263788274. The cubic root of 25040280 is about 292.5587288021.

The spelling of 25040280 in words is "twenty-five million, forty thousand, two hundred eighty".