840830511 has 4 divisors (see below), whose sum is σ = 1121107352. Its totient is φ = 560553672.

The previous prime is 840830477. The next prime is 840830519. The reversal of 840830511 is 115038048.

840830511 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 not a de Polignac number, because 840830511 - 2⁷ = 840830383 is a prime.

It is a super-2 number, since 2×840830511² = 1413991896457042242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840830519) 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, 140138416 + ... + 140138421.

It is an arithmetic number, because the mean of its divisors is an integer number (280276838).

Almost surely, 2^840830511 is an apocalyptic number.

840830511 is a deficient number, since it is larger than the sum of its proper divisors (280276841).

840830511 is a wasteful number, since it uses less digits than its factorization.

840830511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280276840.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 840830511 is about 28997.0776286163. The cubic root of 840830511 is about 943.8496536963.

Adding to 840830511 its reverse (115038048), we get a palindrome (955868559).

The spelling of 840830511 in words is "eight hundred forty million, eight hundred thirty thousand, five hundred eleven".