860609805 has 64 divisors (see below), whose sum is σ = 1538334720. Its totient is φ = 407347200.

The previous prime is 860609801. The next prime is 860609821. The reversal of 860609805 is 508906068.

It is not a de Polignac number, because 860609805 - 2² = 860609801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860609801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1342285 + ... + 1342925.

It is an arithmetic number, because the mean of its divisors is an integer number (24036480).

Almost surely, 2^860609805 is an apocalyptic number.

It is an amenable number.

860609805 is a deficient number, since it is larger than the sum of its proper divisors (677724915).

860609805 is a wasteful number, since it uses less digits than its factorization.

860609805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 860609805 is about 29336.1518437576. The cubic root of 860609805 is about 951.1932577243.

The spelling of 860609805 in words is "eight hundred sixty million, six hundred nine thousand, eight hundred five".