243601280 has 256 divisors, whose sum is σ = 699148800. Its totient is φ = 80289792.

The previous prime is 243601249. The next prime is 243601331. The reversal of 243601280 is 82106342.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3635807 + ... + 3635873.

It is an arithmetic number, because the mean of its divisors is an integer number (2731050).

Almost surely, 2^243601280 is an apocalyptic number.

243601280 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 243601280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349574400).

243601280 is an abundant number, since it is smaller than the sum of its proper divisors (455547520).

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

243601280 is a wasteful number, since it uses less digits than its factorization.

243601280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 243601280 is about 15607.7314174738. The cubic root of 243601280 is about 624.5394196018.

The spelling of 243601280 in words is "two hundred forty-three million, six hundred one thousand, two hundred eighty".