25869680 has 20 divisors (see below), whose sum is σ = 60147192. Its totient is φ = 10347840.

The previous prime is 25869661. The next prime is 25869709. The reversal of 25869680 is 8696852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 161606 + ... + 161765.

Almost surely, 2^25869680 is an apocalyptic number.

25869680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25869680 is an abundant number, since it is smaller than the sum of its proper divisors (34277512).

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

25869680 is a wasteful number, since it uses less digits than its factorization.

25869680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323384 (or 323378 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 25869680 is about 5086.2245329910. The cubic root of 25869680 is about 295.7538128306.

The spelling of 25869680 in words is "twenty-five million, eight hundred sixty-nine thousand, six hundred eighty".