840383240 has 16 divisors (see below), whose sum is σ = 1890862380. Its totient is φ = 336153280.

The previous prime is 840383239. The next prime is 840383251. The reversal of 840383240 is 42383048.

It can be written as a sum of positive squares in 2 ways, for example, as 806673604 + 33709636 = 28402^2 + 5806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 840383197 and 840383206.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10504751 + ... + 10504830.

Almost surely, 2^840383240 is an apocalyptic number.

It is an amenable number.

840383240 is an abundant number, since it is smaller than the sum of its proper divisors (1050479140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840383240 is a wasteful number, since it uses less digits than its factorization.

840383240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21009592 (or 21009588 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 840383240 is about 28989.3642565683. The cubic root of 840383240 is about 943.6822670276.

It can be divided in two parts, 84038 and 3240, that added together give a palindrome (87278).

The spelling of 840383240 in words is "eight hundred forty million, three hundred eighty-three thousand, two hundred forty".