25780982 has 4 divisors (see below), whose sum is σ = 38671476. Its totient is φ = 12890490.

The previous prime is 25780981. The next prime is 25780987. The reversal of 25780982 is 28908752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780981) 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 as a sum of consecutive naturals, namely, 6445244 + ... + 6445247.

It is an arithmetic number, because the mean of its divisors is an integer number (9667869).

Almost surely, 2^25780982 is an apocalyptic number.

25780982 is a deficient number, since it is larger than the sum of its proper divisors (12890494).

25780982 is a wasteful number, since it uses less digits than its factorization.

25780982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12890493.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 25780982 is about 5077.4976120132. The cubic root of 25780982 is about 295.4154139805.

It can be divided in two parts, 25780 and 982, that added together give a palindrome (26762).

The spelling of 25780982 in words is "twenty-five million, seven hundred eighty thousand, nine hundred eighty-two".