82189387 has 16 divisors (see below), whose sum is σ = 96850944. Its totient is φ = 68292000.

The previous prime is 82189381. The next prime is 82189391. The reversal of 82189387 is 78398128.

It is not a de Polignac number, because 82189387 - 2⁷ = 82189259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82189381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28962 + ... + 31672.

It is an arithmetic number, because the mean of its divisors is an integer number (6053184).

Almost surely, 2^82189387 is an apocalyptic number.

82189387 is a deficient number, since it is larger than the sum of its proper divisors (14661557).

82189387 is a wasteful number, since it uses less digits than its factorization.

82189387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its digits is 193536, while the sum is 46.

The square root of 82189387 is about 9065.8362548636. The cubic root of 82189387 is about 434.7823582070.

The spelling of 82189387 in words is "eighty-two million, one hundred eighty-nine thousand, three hundred eighty-seven".