840424023 has 12 divisors (see below), whose sum is σ = 1233847368. Its totient is φ = 551097360.

The previous prime is 840424007. The next prime is 840424033. The reversal of 840424023 is 320424048.

It is a happy number.

It is not a de Polignac number, because 840424023 - 2⁴ = 840424007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840424003) 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 11 ways as a sum of consecutive naturals, for example, 764865 + ... + 765962.

It is an arithmetic number, because the mean of its divisors is an integer number (102820614).

Almost surely, 2^840424023 is an apocalyptic number.

840424023 is a deficient number, since it is larger than the sum of its proper divisors (393423345).

840424023 is a wasteful number, since it uses less digits than its factorization.

840424023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530894 (or 1530891 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 840424023 is about 28990.0676611835. The cubic root of 840424023 is about 943.6975321152.

The spelling of 840424023 in words is "eight hundred forty million, four hundred twenty-four thousand, twenty-three".