243779080 has 32 divisors (see below), whose sum is σ = 549005400. Its totient is φ = 97422336.

The previous prime is 243779057. The next prime is 243779087. The reversal of 243779080 is 80977342.

It can be written as a sum of positive squares in 4 ways, for example, as 152423716 + 91355364 = 12346^2 + 9558^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (243779087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57514 + ... + 61606.

Almost surely, 2^243779080 is an apocalyptic number.

243779080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243779080 is an abundant number, since it is smaller than the sum of its proper divisors (305226320).

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

243779080 is a wasteful number, since it uses less digits than its factorization.

243779080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593 (or 5589 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 243779080 is about 15613.4262735634. The cubic root of 243779080 is about 624.6913291808.

The spelling of 243779080 in words is "two hundred forty-three million, seven hundred seventy-nine thousand, eighty".