243293490 has 128 divisors (see below), whose sum is σ = 714666240. Its totient is φ = 58893120.

The previous prime is 243293489. The next prime is 243293569. The reversal of 243293490 is 94392342.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 359032 + ... + 359708.

It is an arithmetic number, because the mean of its divisors is an integer number (5583330).

Almost surely, 2^243293490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243293490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357333120).

243293490 is an abundant number, since it is smaller than the sum of its proper divisors (471372750).

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

243293490 is a wasteful number, since it uses less digits than its factorization.

243293490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 243293490 is about 15597.8681235610. The cubic root of 243293490 is about 624.2762737426.

The spelling of 243293490 in words is "two hundred forty-three million, two hundred ninety-three thousand, four hundred ninety".