840766455 has 24 divisors (see below), whose sum is σ = 1458999360. Its totient is φ = 447894720.

The previous prime is 840766441. The next prime is 840766457. The reversal of 840766455 is 554667048.

It is not a de Polignac number, because 840766455 - 2⁴ = 840766439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 840766455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840766457) 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 23 ways as a sum of consecutive naturals, for example, 30741 + ... + 51249.

It is an arithmetic number, because the mean of its divisors is an integer number (60791640).

Almost surely, 2^840766455 is an apocalyptic number.

840766455 is a deficient number, since it is larger than the sum of its proper divisors (618232905).

840766455 is a wasteful number, since it uses less digits than its factorization.

840766455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21431 (or 21428 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 840766455 is about 28995.9730824816. The cubic root of 840766455 is about 943.8256850256.

The spelling of 840766455 in words is "eight hundred forty million, seven hundred sixty-six thousand, four hundred fifty-five".