25271680 has 64 divisors (see below), whose sum is σ = 69058080. Its totient is φ = 8663040.

The previous prime is 25271677. The next prime is 25271693. The reversal of 25271680 is 8617252.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660 + ... + 7300.

Almost surely, 2^25271680 is an apocalyptic number.

25271680 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 25271680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34529040).

25271680 is an abundant number, since it is smaller than the sum of its proper divisors (43786400).

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

25271680 is an equidigital number, since it uses as much as digits as its factorization.

25271680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667 (or 5655 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 25271680 is about 5027.0945883283. The cubic root of 25271680 is about 293.4571561723.

The spelling of 25271680 in words is "twenty-five million, two hundred seventy-one thousand, six hundred eighty".