243030138 has 32 divisors (see below), whose sum is σ = 534594816. Its totient is φ = 73186368.

The previous prime is 243030133. The next prime is 243030163. The reversal of 243030138 is 831030342.

It is not an unprimeable number, because it can be changed into a prime (243030131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29481 + ... + 36812.

It is an arithmetic number, because the mean of its divisors is an integer number (16706088).

Almost surely, 2^243030138 is an apocalyptic number.

243030138 is an abundant number, since it is smaller than the sum of its proper divisors (291564678).

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

243030138 is a wasteful number, since it uses less digits than its factorization.

243030138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66358.

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

The square root of 243030138 is about 15589.4239149495. The cubic root of 243030138 is about 624.0509440245.

The spelling of 243030138 in words is "two hundred forty-three million, thirty thousand, one hundred thirty-eight".