25662880 has 48 divisors (see below), whose sum is σ = 61236000. Its totient is φ = 10162432.

The previous prime is 25662839. The next prime is 25662899. The reversal of 25662880 is 8826652.

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 7 ways as a sum of consecutive naturals, for example, 16371 + ... + 17869.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^25662880 is an apocalyptic number.

25662880 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 25662880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30618000).

25662880 is an abundant number, since it is smaller than the sum of its proper divisors (35573120).

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

25662880 is a wasteful number, since it uses less digits than its factorization.

25662880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 25662880 is about 5065.8543208426. The cubic root of 25662880 is about 294.9636266558.

It can be divided in two parts, 25662 and 880, that multiplied together give a triangular number (22582560 = T₆₇₂₀).

The spelling of 25662880 in words is "twenty-five million, six hundred sixty-two thousand, eight hundred eighty".