243281280 has 128 divisors (see below), whose sum is σ = 846028800. Its totient is φ = 58972160.

The previous prime is 243281257. The next prime is 243281303. The reversal of 243281280 is 82182342.

It is an interprime number because it is at equal distance from previous prime (243281257) and next prime (243281303).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 15361 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (6609600).

Almost surely, 2^243281280 is an apocalyptic number.

243281280 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 243281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423014400).

243281280 is an abundant number, since it is smaller than the sum of its proper divisors (602747520).

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

243281280 is a wasteful number, since it uses less digits than its factorization.

243281280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552 (or 11540 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 243281280 is about 15597.4767190081. The cubic root of 243281280 is about 624.2658301959.

The spelling of 243281280 in words is "two hundred forty-three million, two hundred eighty-one thousand, two hundred eighty".