25740280 has 16 divisors (see below), whose sum is σ = 57915720. Its totient is φ = 10296096.

The previous prime is 25740263. The next prime is 25740293. The reversal of 25740280 is 8204752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321714 + ... + 321793.

Almost surely, 2^25740280 is an apocalyptic number.

25740280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25740280 is an abundant number, since it is smaller than the sum of its proper divisors (32175440).

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

25740280 is a wasteful number, since it uses less digits than its factorization.

25740280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643518 (or 643514 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 25740280 is about 5073.4879520898. The cubic root of 25740280 is about 295.2598686847.

The spelling of 25740280 in words is "twenty-five million, seven hundred forty thousand, two hundred eighty".