243785880 has 144 divisors (see below), whose sum is σ = 858152880. Its totient is φ = 59993856.

The previous prime is 243785873. The next prime is 243785987. The reversal of 243785880 is 88587342.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 58837 + ... + 62843.

It is an arithmetic number, because the mean of its divisors is an integer number (5959395).

Almost surely, 2^243785880 is an apocalyptic number.

243785880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243785880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429076440).

243785880 is an abundant number, since it is smaller than the sum of its proper divisors (614367000).

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

243785880 is a wasteful number, since it uses less digits than its factorization.

243785880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050 (or 4030 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 243785880 is about 15613.6440333447. The cubic root of 243785880 is about 624.6971375293.

The spelling of 243785880 in words is "two hundred forty-three million, seven hundred eighty-five thousand, eight hundred eighty".