25680180 has 24 divisors (see below), whose sum is σ = 71904672. Its totient is φ = 6848032.

The previous prime is 25680173. The next prime is 25680181. The reversal of 25680180 is 8108652.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25680181) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 213942 + ... + 214061.

It is an arithmetic number, because the mean of its divisors is an integer number (2996028).

Almost surely, 2^25680180 is an apocalyptic number.

25680180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25680180 is an abundant number, since it is smaller than the sum of its proper divisors (46224492).

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

25680180 is a wasteful number, since it uses less digits than its factorization.

25680180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428015 (or 428013 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 25680180 is about 5067.5615437802. The cubic root of 25680180 is about 295.0298925947.

The spelling of 25680180 in words is "twenty-five million, six hundred eighty thousand, one hundred eighty".