25959778 has 16 divisors (see below), whose sum is σ = 43759296. Its totient is φ = 11460240.

The previous prime is 25959763. The next prime is 25959781. The reversal of 25959778 is 87795952.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21108 + ... + 22303.

It is an arithmetic number, because the mean of its divisors is an integer number (2734956).

Almost surely, 2^25959778 is an apocalyptic number.

25959778 is a deficient number, since it is larger than the sum of its proper divisors (17799518).

25959778 is a wasteful number, since it uses less digits than its factorization.

25959778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43449.

The product of its digits is 1587600, while the sum is 52.

The square root of 25959778 is about 5095.0738954406. The cubic root of 25959778 is about 296.0967619493.

The spelling of 25959778 in words is "twenty-five million, nine hundred fifty-nine thousand, seven hundred seventy-eight".