840246885 has 16 divisors (see below), whose sum is σ = 1493772480. Its totient is φ = 448131600.

The previous prime is 840246853. The next prime is 840246889. The reversal of 840246885 is 588642048.

It is not a de Polignac number, because 840246885 - 2⁵ = 840246853 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 840246885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840246889) 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 in 15 ways as a sum of consecutive naturals, for example, 3111891 + ... + 3112160.

It is an arithmetic number, because the mean of its divisors is an integer number (93360780).

Almost surely, 2^840246885 is an apocalyptic number.

It is an amenable number.

840246885 is a deficient number, since it is larger than the sum of its proper divisors (653525595).

840246885 is a wasteful number, since it uses less digits than its factorization.

840246885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224065 (or 6224059 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The square root of 840246885 is about 28987.0123503613. The cubic root of 840246885 is about 943.6312257290.

It can be divided in two parts, 84024 and 6885, that added together give a palindrome (90909).

The spelling of 840246885 in words is "eight hundred forty million, two hundred forty-six thousand, eight hundred eighty-five".