243990250 has 32 divisors (see below), whose sum is σ = 522003456. Its totient is φ = 83653200.

The previous prime is 243990209. The next prime is 243990317. The reversal of 243990250 is 52099342.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67962 + ... + 71461.

It is an arithmetic number, because the mean of its divisors is an integer number (16312608).

Almost surely, 2^243990250 is an apocalyptic number.

243990250 is an abundant number, since it is smaller than the sum of its proper divisors (278013206).

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

243990250 is a wasteful number, since it uses less digits than its factorization.

243990250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139447 (or 139437 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 243990250 is about 15620.1872588007. The cubic root of 243990250 is about 624.8716536453.

The spelling of 243990250 in words is "two hundred forty-three million, nine hundred ninety thousand, two hundred fifty".