840535238 has 4 divisors (see below), whose sum is σ = 1260802860. Its totient is φ = 420267618.

The previous prime is 840535237. The next prime is 840535261. The reversal of 840535238 is 832535048.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840535237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210133808 + ... + 210133811.

It is an arithmetic number, because the mean of its divisors is an integer number (315200715).

Almost surely, 2^840535238 is an apocalyptic number.

840535238 is a deficient number, since it is larger than the sum of its proper divisors (420267622).

840535238 is a wasteful number, since it uses less digits than its factorization.

840535238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420267621.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 840535238 is about 28991.9857546874. The cubic root of 840535238 is about 943.7391574095.

The spelling of 840535238 in words is "eight hundred forty million, five hundred thirty-five thousand, two hundred thirty-eight".