25686480 has 160 divisors (see below), whose sum is σ = 86423040. Its totient is φ = 6289920.

The previous prime is 25686467. The next prime is 25686497. The reversal of 25686480 is 8468652.

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 31 ways as a sum of consecutive naturals, for example, 196015 + ... + 196145.

It is an arithmetic number, because the mean of its divisors is an integer number (540144).

Almost surely, 2^25686480 is an apocalyptic number.

25686480 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 25686480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43211520).

25686480 is an abundant number, since it is smaller than the sum of its proper divisors (60736560).

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

25686480 is a wasteful number, since it uses less digits than its factorization.

25686480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 203 counting only the distinct ones).

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

The square root of 25686480 is about 5068.1831064002. The cubic root of 25686480 is about 295.0540167292.

It can be divided in two parts, 256 and 86480, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 25686480 in words is "twenty-five million, six hundred eighty-six thousand, four hundred eighty".