243485980 has 24 divisors (see below), whose sum is σ = 518525280. Its totient is φ = 96022080.

The previous prime is 243485927. The next prime is 243485987. The reversal of 243485980 is 89584342.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243485987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84315 + ... + 87154.

It is an arithmetic number, because the mean of its divisors is an integer number (21605220).

Almost surely, 2^243485980 is an apocalyptic number.

243485980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243485980 is an abundant number, since it is smaller than the sum of its proper divisors (275039300).

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

243485980 is a wasteful number, since it uses less digits than its factorization.

243485980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171549 (or 171547 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 243485980 is about 15604.0372980841. The cubic root of 243485980 is about 624.4408695462.

The spelling of 243485980 in words is "two hundred forty-three million, four hundred eighty-five thousand, nine hundred eighty".