243978244 has 12 divisors (see below), whose sum is σ = 427569100. Its totient is φ = 121815648.

The previous prime is 243978233. The next prime is 243978283. The reversal of 243978244 is 442879342.

It can be written as a sum of positive squares in 2 ways, for example, as 81721600 + 162256644 = 9040^2 + 12738^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 243978244.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40179 + ... + 45850.

Almost surely, 2^243978244 is an apocalyptic number.

It is an amenable number.

243978244 is a deficient number, since it is larger than the sum of its proper divisors (183590856).

243978244 is a wasteful number, since it uses less digits than its factorization.

243978244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86742 (or 86740 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 243978244 is about 15619.8029436994. The cubic root of 243978244 is about 624.8614041482.

The spelling of 243978244 in words is "two hundred forty-three million, nine hundred seventy-eight thousand, two hundred forty-four".