243255978 has 24 divisors (see below), whose sum is σ = 602348448. Its totient is φ = 69501672.

The previous prime is 243255959. The next prime is 243255989. The reversal of 243255978 is 879552342.

243255978 is a `hidden beast` number, since 24 + 3 + 2 + 559 + 78 = 666.

243255978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 965176 + ... + 965427.

It is an arithmetic number, because the mean of its divisors is an integer number (25097852).

Almost surely, 2^243255978 is an apocalyptic number.

243255978 is an abundant number, since it is smaller than the sum of its proper divisors (359092470).

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

243255978 is a wasteful number, since it uses less digits than its factorization.

243255978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930618 (or 1930615 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 243255978 is about 15596.6656051863. The cubic root of 243255978 is about 624.2441875913.

It can be divided in two parts, 24325 and 5978, that added together give a palindrome (30303).

The spelling of 243255978 in words is "two hundred forty-three million, two hundred fifty-five thousand, nine hundred seventy-eight".