82138806 has 16 divisors (see below), whose sum is σ = 182530800. Its totient is φ = 27379584.

The previous prime is 82138787. The next prime is 82138807. The reversal of 82138806 is 60883128.

It is a super-2 number, since 2×82138806² = 13493566902211272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82138807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760491 + ... + 760598.

It is an arithmetic number, because the mean of its divisors is an integer number (11408175).

Almost surely, 2^82138806 is an apocalyptic number.

82138806 is an abundant number, since it is smaller than the sum of its proper divisors (100391994).

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

82138806 is a wasteful number, since it uses less digits than its factorization.

82138806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521100 (or 1521094 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 82138806 is about 9063.0461766450. The cubic root of 82138806 is about 434.6931486379.

It can be divided in two parts, 82138 and 806, that added together give a square (82944 = 288²).

The spelling of 82138806 in words is "eighty-two million, one hundred thirty-eight thousand, eight hundred six".