243645480 has 192 divisors, whose sum is σ = 864864000. Its totient is φ = 59125248.

The previous prime is 243645469. The next prime is 243645487. The reversal of 243645480 is 84546342.

243645480 is a `hidden beast` number, since 2 + 4 + 3 + 645 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (243645487) 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 47 ways as a sum of consecutive naturals, for example, 369391 + ... + 370049.

It is an arithmetic number, because the mean of its divisors is an integer number (4504500).

Almost surely, 2^243645480 is an apocalyptic number.

243645480 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 243645480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432432000).

243645480 is an abundant number, since it is smaller than the sum of its proper divisors (621218520).

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

243645480 is a wasteful number, since it uses less digits than its factorization.

243645480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 243645480 is about 15609.1473181593. The cubic root of 243645480 is about 624.5771903023.

The spelling of 243645480 in words is "two hundred forty-three million, six hundred forty-five thousand, four hundred eighty".