25798986 has 40 divisors (see below), whose sum is σ = 58649184. Its totient is φ = 8474760.

The previous prime is 25798967. The next prime is 25798987. The reversal of 25798986 is 68989752.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25798987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10381 + ... + 12623.

Almost surely, 2^25798986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25798986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29324592).

25798986 is an abundant number, since it is smaller than the sum of its proper divisors (32850198).

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

25798986 is a wasteful number, since it uses less digits than its factorization.

25798986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328 (or 2319 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 25798986 is about 5079.2702231718. The cubic root of 25798986 is about 295.4841651954.

The spelling of 25798986 in words is "twenty-five million, seven hundred ninety-eight thousand, nine hundred eighty-six".