243872 has 12 divisors (see below), whose sum is σ = 480186. Its totient is φ = 121920.

The previous prime is 243871. The next prime is 243889. The reversal of 243872 is 278342.

It can be written as a sum of positive squares in only one way, i.e., 163216 + 80656 = 404^2 + 284^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243872.

It is not an unprimeable number, because it can be changed into a prime (243871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3779 + ... + 3842.

2²⁴³⁸⁷² is an apocalyptic number.

It is an amenable number.

243872 is a deficient number, since it is larger than the sum of its proper divisors (236314).

243872 is an equidigital number, since it uses as much as digits as its factorization.

243872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631 (or 7623 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 243872 is about 493.8339801998. The cubic root of 243872 is about 62.4770689210.

It can be divided in two parts, 24387 and 2, that added together give a cube (24389 = 29³).

The spelling of 243872 in words is "two hundred forty-three thousand, eight hundred seventy-two".