240863839 has 4 divisors (see below), whose sum is σ = 240894880. Its totient is φ = 240832800.

The previous prime is 240863809. The next prime is 240863849. The reversal of 240863839 is 938368042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 938368042 = 2 ⋅469184021.

It is a cyclic number.

It is not a de Polignac number, because 240863839 - 2¹⁹ = 240339551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240863795 and 240863804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240863809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7639 + ... + 23239.

It is an arithmetic number, because the mean of its divisors is an integer number (60223720).

Almost surely, 2^240863839 is an apocalyptic number.

240863839 is a deficient number, since it is larger than the sum of its proper divisors (31041).

240863839 is a wasteful number, since it uses less digits than its factorization.

240863839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31040.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 240863839 is about 15519.7886261379. The cubic root of 240863839 is about 622.1912052649.

The spelling of 240863839 in words is "two hundred forty million, eight hundred sixty-three thousand, eight hundred thirty-nine".