243422778 has 16 divisors (see below), whose sum is σ = 500004000. Its totient is φ = 78947856.

The previous prime is 243422749. The next prime is 243422783. The reversal of 243422778 is 877224342.

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 7 ways as a sum of consecutive naturals, for example, 548028 + ... + 548471.

It is an arithmetic number, because the mean of its divisors is an integer number (31250250).

Almost surely, 2^243422778 is an apocalyptic number.

243422778 is an abundant number, since it is smaller than the sum of its proper divisors (256581222).

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

243422778 is a wasteful number, since it uses less digits than its factorization.

243422778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096541.

The product of its digits is 150528, while the sum is 39.

The square root of 243422778 is about 15602.0119856383. The cubic root of 243422778 is about 624.3868358710.

The spelling of 243422778 in words is "two hundred forty-three million, four hundred twenty-two thousand, seven hundred seventy-eight".