243244764 has 144 divisors (see below), whose sum is σ = 748500480. Its totient is φ = 65059200.

The previous prime is 243244739. The next prime is 243244769. The reversal of 243244764 is 467442342.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243244769) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 483337 + ... + 483839.

It is an arithmetic number, because the mean of its divisors is an integer number (5197920).

Almost surely, 2^243244764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243244764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374250240).

243244764 is an abundant number, since it is smaller than the sum of its proper divisors (505255716).

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

243244764 is a wasteful number, since it uses less digits than its factorization.

243244764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 635 counting only the distinct ones).

The product of its digits is 129024, while the sum is 36.

The square root of 243244764 is about 15596.3061011254. The cubic root of 243244764 is about 624.2345949776.

The spelling of 243244764 in words is "two hundred forty-three million, two hundred forty-four thousand, seven hundred sixty-four".