243228390 has 16 divisors (see below), whose sum is σ = 583748208. Its totient is φ = 64860896.

The previous prime is 243228371. The next prime is 243228397. The reversal of 243228390 is 93822342.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243228397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4053777 + ... + 4053836.

It is an arithmetic number, because the mean of its divisors is an integer number (36484263).

Almost surely, 2^243228390 is an apocalyptic number.

243228390 is an abundant number, since it is smaller than the sum of its proper divisors (340519818).

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

243228390 is a wasteful number, since it uses less digits than its factorization.

243228390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8107623.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 243228390 is about 15595.7811603010. The cubic root of 243228390 is about 624.2205878975.

The spelling of 243228390 in words is "two hundred forty-three million, two hundred twenty-eight thousand, three hundred ninety".