243939372 has 72 divisors (see below), whose sum is σ = 605122560. Its totient is φ = 76403520.

The previous prime is 243939359. The next prime is 243939379. The reversal of 243939372 is 273939342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243939379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509029 + ... + 509507.

It is an arithmetic number, because the mean of its divisors is an integer number (8404480).

Almost surely, 2^243939372 is an apocalyptic number.

It is an amenable number.

243939372 is an abundant number, since it is smaller than the sum of its proper divisors (361183188).

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

243939372 is a wasteful number, since it uses less digits than its factorization.

243939372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 552 counting only the distinct ones).

The product of its digits is 244944, while the sum is 42.

The square root of 243939372 is about 15618.5585762579. The cubic root of 243939372 is about 624.8282168959.

The spelling of 243939372 in words is "two hundred forty-three million, nine hundred thirty-nine thousand, three hundred seventy-two".