836138 has 4 divisors (see below), whose sum is σ = 1254210. Its totient is φ = 418068.

The previous prime is 836137. The next prime is 836149. The reversal of 836138 is 831638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831638 = 2 ⋅415819.

It can be written as a sum of positive squares in only one way, i.e., 552049 + 284089 = 743^2 + 533^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 836138.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 836138.

It is not an unprimeable number, because it can be changed into a prime (836131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209033 + ... + 209036.

2⁸³⁶¹³⁸ is an apocalyptic number.

836138 is a deficient number, since it is larger than the sum of its proper divisors (418072).

836138 is a wasteful number, since it uses less digits than its factorization.

836138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418071.

The product of its digits is 3456, while the sum is 29.

The square root of 836138 is about 914.4058180042. The cubic root of 836138 is about 94.2090563670.

The spelling of 836138 in words is "eight hundred thirty-six thousand, one hundred thirty-eight".