840710660 has 12 divisors (see below), whose sum is σ = 1765492428. Its totient is φ = 336284256.

The previous prime is 840710659. The next prime is 840710677. The reversal of 840710660 is 66017048.

It can be written as a sum of positive squares in 2 ways, for example, as 622203136 + 218507524 = 24944^2 + 14782^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21017747 + ... + 21017786.

It is an arithmetic number, because the mean of its divisors is an integer number (147124369).

Almost surely, 2^840710660 is an apocalyptic number.

It is an amenable number.

840710660 is an abundant number, since it is smaller than the sum of its proper divisors (924781768).

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

840710660 is a wasteful number, since it uses less digits than its factorization.

840710660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42035542 (or 42035540 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 840710660 is about 28995.0109501618. The cubic root of 840710660 is about 943.8048064892.

The spelling of 840710660 in words is "eight hundred forty million, seven hundred ten thousand, six hundred sixty".