243820164 has 48 divisors (see below), whose sum is σ = 650982528. Its totient is φ = 69577728.

The previous prime is 243820147. The next prime is 243820189. The reversal of 243820164 is 461028342.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106132 + ... + 108404.

It is an arithmetic number, because the mean of its divisors is an integer number (13562136).

Almost surely, 2^243820164 is an apocalyptic number.

It is an amenable number.

243820164 is an abundant number, since it is smaller than the sum of its proper divisors (407162364).

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

243820164 is a wasteful number, since it uses less digits than its factorization.

243820164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564 (or 3562 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 243820164 is about 15614.7418806716. The cubic root of 243820164 is about 624.7264202107.

The spelling of 243820164 in words is "two hundred forty-three million, eight hundred twenty thousand, one hundred sixty-four".