243290740 has 96 divisors (see below), whose sum is σ = 674521344. Its totient is φ = 71362560.

The previous prime is 243290737. The next prime is 243290743. The reversal of 243290740 is 47092342.

It is an interprime number because it is at equal distance from previous prime (243290737) and next prime (243290743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243290743) by changing a digit.

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, 21534 + ... + 30826.

It is an arithmetic number, because the mean of its divisors is an integer number (7026264).

Almost surely, 2^243290740 is an apocalyptic number.

243290740 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 243290740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337260672).

243290740 is an abundant number, since it is smaller than the sum of its proper divisors (431230604).

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

243290740 is a wasteful number, since it uses less digits than its factorization.

243290740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337 (or 9335 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 243290740 is about 15597.7799702394. The cubic root of 243290740 is about 624.2739216229.

The spelling of 243290740 in words is "two hundred forty-three million, two hundred ninety thousand, seven hundred forty".