243420860 has 24 divisors (see below), whose sum is σ = 512341200. Its totient is φ = 97147904.

The previous prime is 243420851. The next prime is 243420887. The reversal of 243420860 is 68024342.

243420860 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, 4574 + ... + 22533.

It is an arithmetic number, because the mean of its divisors is an integer number (21347550).

Almost surely, 2^243420860 is an apocalyptic number.

243420860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243420860 is an abundant number, since it is smaller than the sum of its proper divisors (268920340).

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

243420860 is a wasteful number, since it uses less digits than its factorization.

243420860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27565 (or 27563 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 243420860 is about 15601.9505190857. The cubic root of 243420860 is about 624.3851959572.

The spelling of 243420860 in words is "two hundred forty-three million, four hundred twenty thousand, eight hundred sixty".