25660480 has 112 divisors (see below), whose sum is σ = 66659760. Its totient is φ = 9371648.

The previous prime is 25660471. The next prime is 25660501. The reversal of 25660480 is 8406652.

It can be written as a sum of positive squares in 8 ways, for example, as 16384 + 25644096 = 128^2 + 5064^2 .

It is a congruent number.

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, 288276 + ... + 288364.

Almost surely, 2^25660480 is an apocalyptic number.

25660480 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 25660480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33329880).

25660480 is an abundant number, since it is smaller than the sum of its proper divisors (40999280).

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

25660480 is a wasteful number, since it uses less digits than its factorization.

25660480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 25660480 is about 5065.6174352195. The cubic root of 25660480 is about 294.9544313411.

The spelling of 25660480 in words is "twenty-five million, six hundred sixty thousand, four hundred eighty".