840028345 has 16 divisors (see below), whose sum is σ = 1096123392. Its totient is φ = 614301120.

The previous prime is 840028339. The next prime is 840028351. The reversal of 840028345 is 543820048.

It is an interprime number because it is at equal distance from previous prime (840028339) and next prime (840028351).

It is not a de Polignac number, because 840028345 - 2²⁷ = 705810617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840028345.

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 15 ways as a sum of consecutive naturals, for example, 56041 + ... + 69430.

It is an arithmetic number, because the mean of its divisors is an integer number (68507712).

Almost surely, 2^840028345 is an apocalyptic number.

It is an amenable number.

840028345 is a deficient number, since it is larger than the sum of its proper divisors (256095047).

840028345 is a wasteful number, since it uses less digits than its factorization.

840028345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125592.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 840028345 is about 28983.2424859607. The cubic root of 840028345 is about 943.5494088833.

The spelling of 840028345 in words is "eight hundred forty million, twenty-eight thousand, three hundred forty-five".