82138236 has 12 divisors (see below), whose sum is σ = 191655912. Its totient is φ = 27379408.

The previous prime is 82138223. The next prime is 82138241. The reversal of 82138236 is 63283128.

82138236 is nontrivially palindromic in base 8.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 82138197 and 82138206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422415 + ... + 3422438.

It is an arithmetic number, because the mean of its divisors is an integer number (15971326).

Almost surely, 2^82138236 is an apocalyptic number.

It is an amenable number.

82138236 is an abundant number, since it is smaller than the sum of its proper divisors (109517676).

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

82138236 is a wasteful number, since it uses less digits than its factorization.

82138236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844860 (or 6844858 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 82138236 is about 9063.0147302098. The cubic root of 82138236 is about 434.6921431218.

The spelling of 82138236 in words is "eighty-two million, one hundred thirty-eight thousand, two hundred thirty-six".