243872340 has 24 divisors (see below), whose sum is σ = 682842720. Its totient is φ = 65032608.

The previous prime is 243872333. The next prime is 243872347. The reversal of 243872340 is 43278342.

It is an interprime number because it is at equal distance from previous prime (243872333) and next prime (243872347).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243872347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2032210 + ... + 2032329.

It is an arithmetic number, because the mean of its divisors is an integer number (28451780).

Almost surely, 2^243872340 is an apocalyptic number.

243872340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243872340 is an abundant number, since it is smaller than the sum of its proper divisors (438970380).

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

243872340 is a wasteful number, since it uses less digits than its factorization.

243872340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064551 (or 4064549 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 243872340 is about 15616.4125201661. The cubic root of 243872340 is about 624.7709795563.

The spelling of 243872340 in words is "two hundred forty-three million, eight hundred seventy-two thousand, three hundred forty".