25646880 has 192 divisors, whose sum is σ = 97977600. Its totient is φ = 5505024.

The previous prime is 25646869. The next prime is 25646893. The reversal of 25646880 is 8864652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56896 + ... + 57344.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^25646880 is an apocalyptic number.

25646880 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 25646880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48988800).

25646880 is an abundant number, since it is smaller than the sum of its proper divisors (72330720).

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

25646880 is a wasteful number, since it uses less digits than its factorization.

25646880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 25646880 is about 5064.2748740565. The cubic root of 25646880 is about 294.9023137249.

The spelling of 25646880 in words is "twenty-five million, six hundred forty-six thousand, eight hundred eighty".