860810138 has 4 divisors (see below), whose sum is σ = 1291215210. Its totient is φ = 430405068.

The previous prime is 860810131. The next prime is 860810207. The reversal of 860810138 is 831018068.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 847799689 + 13010449 = 29117^2 + 3607^2 .

It is a junction number, because it is equal to n+sod(n) for n = 860810098 and 860810107.

It is not an unprimeable number, because it can be changed into a prime (860810131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215202533 + ... + 215202536.

Almost surely, 2^860810138 is an apocalyptic number.

860810138 is a deficient number, since it is larger than the sum of its proper divisors (430405072).

860810138 is a wasteful number, since it uses less digits than its factorization.

860810138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430405071.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 860810138 is about 29339.5660840443. The cubic root of 860810138 is about 951.2670583456.

The spelling of 860810138 in words is "eight hundred sixty million, eight hundred ten thousand, one hundred thirty-eight".