243733820 has 24 divisors (see below), whose sum is σ = 558372528. Its totient is φ = 88630400.

The previous prime is 243733817. The next prime is 243733883. The reversal of 243733820 is 28337342.

243733820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553721 + ... + 554160.

It is an arithmetic number, because the mean of its divisors is an integer number (23265522).

Almost surely, 2^243733820 is an apocalyptic number.

243733820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243733820 is an abundant number, since it is smaller than the sum of its proper divisors (314638708).

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

243733820 is a wasteful number, since it uses less digits than its factorization.

243733820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107901 (or 1107899 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 243733820 is about 15611.9768126910. The cubic root of 243733820 is about 624.6526667445.

The spelling of 243733820 in words is "two hundred forty-three million, seven hundred thirty-three thousand, eight hundred twenty".