26565978 has 16 divisors (see below), whose sum is σ = 53260416. Its totient is φ = 8833920.

The previous prime is 26565953. The next prime is 26566013. The reversal of 26565978 is 87956562.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 7722.

It is an arithmetic number, because the mean of its divisors is an integer number (3328776).

Almost surely, 2^26565978 is an apocalyptic number.

26565978 is an abundant number, since it is smaller than the sum of its proper divisors (26694438).

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

26565978 is a wasteful number, since it uses less digits than its factorization.

26565978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709.

The product of its digits is 907200, while the sum is 48.

The square root of 26565978 is about 5154.2194365393. The cubic root of 26565978 is about 298.3838199532.

The spelling of 26565978 in words is "twenty-six million, five hundred sixty-five thousand, nine hundred seventy-eight".