25980380 has 12 divisors (see below), whose sum is σ = 54558840. Its totient is φ = 10392144.

The previous prime is 25980379. The next prime is 25980397. The reversal of 25980380 is 8308952.

It is a self number, because there is not a number n which added to its sum of digits gives 25980380.

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, 649490 + ... + 649529.

It is an arithmetic number, because the mean of its divisors is an integer number (4546570).

Almost surely, 2^25980380 is an apocalyptic number.

25980380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25980380 is an abundant number, since it is smaller than the sum of its proper divisors (28578460).

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

25980380 is a wasteful number, since it uses less digits than its factorization.

25980380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299028 (or 1299026 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 25980380 is about 5097.0952512191. The cubic root of 25980380 is about 296.1750699184.

The spelling of 25980380 in words is "twenty-five million, nine hundred eighty thousand, three hundred eighty".