25798556 has 48 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 10715328.

The previous prime is 25798511. The next prime is 25798567. The reversal of 25798556 is 65589752.

25798556 is nontrivially palindromic in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 25798556.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 236630 + ... + 236738.

It is an arithmetic number, because the mean of its divisors is an integer number (1108800).

Almost surely, 2^25798556 is an apocalyptic number.

It is an amenable number.

25798556 is an abundant number, since it is smaller than the sum of its proper divisors (27423844).

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

25798556 is a wasteful number, since it uses less digits than its factorization.

25798556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 304 counting only the distinct ones).

The product of its digits is 756000, while the sum is 47.

The square root of 25798556 is about 5079.2278940800. The cubic root of 25798556 is about 295.4825235431.

The spelling of 25798556 in words is "twenty-five million, seven hundred ninety-eight thousand, five hundred fifty-six".