243970442 has 16 divisors (see below), whose sum is σ = 368178432. Its totient is φ = 121247280.

The previous prime is 243970439. The next prime is 243970477. The reversal of 243970442 is 244079342.

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, 450692 + ... + 451232.

It is an arithmetic number, because the mean of its divisors is an integer number (23011152).

Almost surely, 2^243970442 is an apocalyptic number.

243970442 is a deficient number, since it is larger than the sum of its proper divisors (124207990).

243970442 is a wasteful number, since it uses less digits than its factorization.

243970442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 243970442 is about 15619.5531946340. The cubic root of 243970442 is about 624.8547434168.

Subtracting 243970442 from its reverse (244079342), we obtain a square (108900 = 330²).

The spelling of 243970442 in words is "two hundred forty-three million, nine hundred seventy thousand, four hundred forty-two".