840464783 has 4 divisors (see below), whose sum is σ = 843150288. Its totient is φ = 837779280.

The previous prime is 840464773. The next prime is 840464797. The reversal of 840464783 is 387464048.

840464783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 840464783 - 2⁶ = 840464719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840464743) 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, 1342283 + ... + 1342908.

It is an arithmetic number, because the mean of its divisors is an integer number (210787572).

Almost surely, 2^840464783 is an apocalyptic number.

840464783 is a deficient number, since it is larger than the sum of its proper divisors (2685505).

840464783 is a wasteful number, since it uses less digits than its factorization.

840464783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685504.

The product of its (nonzero) digits is 516096, while the sum is 44.

The square root of 840464783 is about 28990.7706520541. The cubic root of 840464783 is about 943.7127881005.

The spelling of 840464783 in words is "eight hundred forty million, four hundred sixty-four thousand, seven hundred eighty-three".