8620138 has 4 divisors (see below), whose sum is σ = 12930210. Its totient is φ = 4310068.

The previous prime is 8620133. The next prime is 8620141. The reversal of 8620138 is 8310268.

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., 8392609 + 227529 = 2897^2 + 477^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8620133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2155033 + ... + 2155036.

Almost surely, 2^8620138 is an apocalyptic number.

8620138 is a deficient number, since it is larger than the sum of its proper divisors (4310072).

8620138 is a wasteful number, since it uses less digits than its factorization.

8620138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310071.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8620138 is about 2936.0071525798. The cubic root of 8620138 is about 205.0397543366.

The spelling of 8620138 in words is "eight million, six hundred twenty thousand, one hundred thirty-eight".