25189680 has 80 divisors (see below), whose sum is σ = 78923520. Its totient is φ = 6645504.

The previous prime is 25189679. The next prime is 25189691. The reversal of 25189680 is 8698152.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24211 + ... + 25229.

It is an arithmetic number, because the mean of its divisors is an integer number (986544).

Almost surely, 2^25189680 is an apocalyptic number.

25189680 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 25189680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39461760).

25189680 is an abundant number, since it is smaller than the sum of its proper divisors (53733840).

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

25189680 is a wasteful number, since it uses less digits than its factorization.

25189680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 25189680 is about 5018.9321573418. The cubic root of 25189680 is about 293.1394149906.

The spelling of 25189680 in words is "twenty-five million, one hundred eighty-nine thousand, six hundred eighty".