2440243993 has 4 divisors (see below), whose sum is σ = 2662084368. Its totient is φ = 2218403620.

The previous prime is 2440243987. The next prime is 2440244011. The reversal of 2440243993 is 3993420442.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2440243993 - 2⁵ = 2440243961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2440243933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110920171 + ... + 110920192.

It is an arithmetic number, because the mean of its divisors is an integer number (665521092).

Almost surely, 2^2440243993 is an apocalyptic number.

It is an amenable number.

2440243993 is a deficient number, since it is larger than the sum of its proper divisors (221840375).

2440243993 is a wasteful number, since it uses less digits than its factorization.

2440243993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221840374.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 2440243993 is about 49398.8258261267. The cubic root of 2440243993 is about 1346.3079721066.

The spelling of 2440243993 in words is "two billion, four hundred forty million, two hundred forty-three thousand, nine hundred ninety-three".