6860440686 has 32 divisors (see below), whose sum is σ = 15086112768. Its totient is φ = 2062549440.

The previous prime is 6860440669. The next prime is 6860440723.

6860440686 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6860440686² = 94131292812248301192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400855 + ... + 417618.

It is an arithmetic number, because the mean of its divisors is an integer number (471441024).

Almost surely, 2^6860440686 is an apocalyptic number.

6860440686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6860440686 is an abundant number, since it is smaller than the sum of its proper divisors (8225672082).

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

6860440686 is a wasteful number, since it uses less digits than its factorization.

6860440686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818616.

The product of its (nonzero) digits is 1327104, while the sum is 48.

The square root of 6860440686 is about 82827.7772610131. Note that the first 3 decimals coincide. The cubic root of 6860440686 is about 1900.1330180187.

The spelling of 6860440686 in words is "six billion, eight hundred sixty million, four hundred forty thousand, six hundred eighty-six".