25984278 has 12 divisors (see below), whose sum is σ = 56299308. Its totient is φ = 8661420.

The previous prime is 25984247. The next prime is 25984289. The reversal of 25984278 is 87248952.

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 5 ways as a sum of consecutive naturals, for example, 721768 + ... + 721803.

It is an arithmetic number, because the mean of its divisors is an integer number (4691609).

Almost surely, 2^25984278 is an apocalyptic number.

25984278 is an abundant number, since it is smaller than the sum of its proper divisors (30315030).

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

25984278 is a wasteful number, since it uses less digits than its factorization.

25984278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443579 (or 1443576 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 25984278 is about 5097.4776115251. The cubic root of 25984278 is about 296.1898815145.

It can be divided in two parts, 25984 and 278, that added together give a palindrome (26262).

The spelling of 25984278 in words is "twenty-five million, nine hundred eighty-four thousand, two hundred seventy-eight".