243022290 has 64 divisors (see below), whose sum is σ = 684612864. Its totient is φ = 54044928.

The previous prime is 243022229. The next prime is 243022313. The reversal of 243022290 is 92220342.

It is a self number, because there is not a number n which added to its sum of digits gives 243022290.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7869 + ... + 23408.

It is an arithmetic number, because the mean of its divisors is an integer number (10697076).

Almost surely, 2^243022290 is an apocalyptic number.

243022290 is an abundant number, since it is smaller than the sum of its proper divisors (441590574).

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

243022290 is a wasteful number, since it uses less digits than its factorization.

243022290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31331.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 243022290 is about 15589.1722038086. The cubic root of 243022290 is about 624.0442266073.

The spelling of 243022290 in words is "two hundred forty-three million, twenty-two thousand, two hundred ninety".