860409845 has 16 divisors (see below), whose sum is σ = 1069150320. Its totient is φ = 663936000.

The previous prime is 860409841. The next prime is 860409857. The reversal of 860409845 is 548904068.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 209496676 + 650913169 = 14474^2 + 25513^2 .

It is not a de Polignac number, because 860409845 - 2² = 860409841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 860409796 and 860409805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860409841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186365 + ... + 190925.

It is an arithmetic number, because the mean of its divisors is an integer number (66821895).

Almost surely, 2^860409845 is an apocalyptic number.

It is an amenable number.

860409845 is a deficient number, since it is larger than the sum of its proper divisors (208740475).

860409845 is a wasteful number, since it uses less digits than its factorization.

860409845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5896.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 860409845 is about 29332.7435641469. The cubic root of 860409845 is about 951.1195830906.

The spelling of 860409845 in words is "eight hundred sixty million, four hundred nine thousand, eight hundred forty-five".