243863140 has 12 divisors (see below), whose sum is σ = 512112636. Its totient is φ = 97545248.

The previous prime is 243863131. The next prime is 243863167. The reversal of 243863140 is 41368342.

It can be written as a sum of positive squares in 2 ways, for example, as 125619264 + 118243876 = 11208^2 + 10874^2 .

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, 6096559 + ... + 6096598.

It is an arithmetic number, because the mean of its divisors is an integer number (42676053).

Almost surely, 2^243863140 is an apocalyptic number.

243863140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243863140 is an abundant number, since it is smaller than the sum of its proper divisors (268249496).

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

243863140 is a wasteful number, since it uses less digits than its factorization.

243863140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12193166 (or 12193164 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 243863140 is about 15616.1179554971. The cubic root of 243863140 is about 624.7631230342.

The spelling of 243863140 in words is "two hundred forty-three million, eight hundred sixty-three thousand, one hundred forty".