82145238 has 16 divisors (see below), whose sum is σ = 187760640. Its totient is φ = 23470056.

The previous prime is 82145233. The next prime is 82145299. The reversal of 82145238 is 83254128.

It is a junction number, because it is equal to n+sod(n) for n = 82145199 and 82145208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82145233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977878 + ... + 977961.

It is an arithmetic number, because the mean of its divisors is an integer number (11735040).

Almost surely, 2^82145238 is an apocalyptic number.

82145238 is an abundant number, since it is smaller than the sum of its proper divisors (105615402).

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

82145238 is a wasteful number, since it uses less digits than its factorization.

82145238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955851.

The product of its digits is 15360, while the sum is 33.

The square root of 82145238 is about 9063.4010172782. The cubic root of 82145238 is about 434.7044947705.

The spelling of 82145238 in words is "eighty-two million, one hundred forty-five thousand, two hundred thirty-eight".