25780132 has 24 divisors (see below), whose sum is σ = 52186176. Its totient is φ = 10914528.

The previous prime is 25780121. The next prime is 25780141. The reversal of 25780132 is 23108752.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 25780132.

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 7 ways as a sum of consecutive naturals, for example, 3223 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (2174424).

Almost surely, 2^25780132 is an apocalyptic number.

It is an amenable number.

25780132 is an abundant number, since it is smaller than the sum of its proper divisors (26406044).

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

25780132 is a wasteful number, since it uses less digits than its factorization.

25780132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11187 (or 11185 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25780132 is about 5077.4139086744. The cubic root of 25780132 is about 295.4121673255.

Adding to 25780132 its reverse (23108752), we get a palindrome (48888884).

The spelling of 25780132 in words is "twenty-five million, seven hundred eighty thousand, one hundred thirty-two".