243990798 has 32 divisors (see below), whose sum is σ = 492825600. Its totient is φ = 80527776.

The previous prime is 243990787. The next prime is 243990809. The reversal of 243990798 is 897099342.

It is an interprime number because it is at equal distance from previous prime (243990787) and next prime (243990809).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243990798.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 328015 + ... + 328757.

It is an arithmetic number, because the mean of its divisors is an integer number (15400800).

Almost surely, 2^243990798 is an apocalyptic number.

243990798 is an abundant number, since it is smaller than the sum of its proper divisors (248834802).

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

243990798 is a wasteful number, since it uses less digits than its factorization.

243990798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 243990798 is about 15620.2048001939. The cubic root of 243990798 is about 624.8721214638.

The spelling of 243990798 in words is "two hundred forty-three million, nine hundred ninety thousand, seven hundred ninety-eight".