860344439931 has 24 divisors (see below), whose sum is σ = 1296908271360. Its totient is φ = 548558919216.

The previous prime is 860344439917. The next prime is 860344439957. The reversal of 860344439931 is 139934443068.

It is a happy number.

860344439931 is a `hidden beast` number, since 86 + 0 + 3 + 4 + 443 + 99 + 31 = 666.

It is not a de Polignac number, because 860344439931 - 2¹⁸ = 860344177787 is a prime.

It is a super-2 number, since 2×860344439931² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (860344439131) 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 23 ways as a sum of consecutive naturals, for example, 1488330 + ... + 1983888.

It is an arithmetic number, because the mean of its divisors is an integer number (54037844640).

Almost surely, 2^860344439931 is an apocalyptic number.

860344439931 is a deficient number, since it is larger than the sum of its proper divisors (436563831429).

860344439931 is a wasteful number, since it uses less digits than its factorization.

860344439931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503975 (or 503972 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 860344439931 in words is "eight hundred sixty billion, three hundred forty-four million, four hundred thirty-nine thousand, nine hundred thirty-one".