243807980 has 48 divisors (see below), whose sum is σ = 553242144. Its totient is φ = 89717760.

The previous prime is 243807961. The next prime is 243807997. The reversal of 243807980 is 89708342.

243807980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243807980² = 118884662223360800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84644 + ... + 87476.

It is an arithmetic number, because the mean of its divisors is an integer number (11525878).

Almost surely, 2^243807980 is an apocalyptic number.

243807980 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 243807980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276621072).

243807980 is an abundant number, since it is smaller than the sum of its proper divisors (309434164).

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

243807980 is a wasteful number, since it uses less digits than its factorization.

243807980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 243807980 is about 15614.3517316602. The cubic root of 243807980 is about 624.7160139159.

The spelling of 243807980 in words is "two hundred forty-three million, eight hundred seven thousand, nine hundred eighty".