840445770 has 16 divisors (see below), whose sum is σ = 2017069920. Its totient is φ = 224118864.

The previous prime is 840445747. The next prime is 840445777. The reversal of 840445770 is 77544048.

It is not an unprimeable number, because it can be changed into a prime (840445777) 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 7 ways as a sum of consecutive naturals, for example, 14007400 + ... + 14007459.

It is an arithmetic number, because the mean of its divisors is an integer number (126066870).

Almost surely, 2^840445770 is an apocalyptic number.

840445770 is an abundant number, since it is smaller than the sum of its proper divisors (1176624150).

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

840445770 is a wasteful number, since it uses less digits than its factorization.

840445770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28014869.

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 840445770 is about 28990.4427354947. The cubic root of 840445770 is about 943.7056718211.

The spelling of 840445770 in words is "eight hundred forty million, four hundred forty-five thousand, seven hundred seventy".