78982189 has 16 divisors (see below), whose sum is σ = 93542400. Its totient is φ = 65741760.

The previous prime is 78982181. The next prime is 78982193. The reversal of 78982189 is 98128987.

It is a cyclic number.

It is not a de Polignac number, because 78982189 - 2³ = 78982181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78982181) 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, 15987 + ... + 20335.

It is an arithmetic number, because the mean of its divisors is an integer number (5846400).

Almost surely, 2^78982189 is an apocalyptic number.

It is an amenable number.

78982189 is a deficient number, since it is larger than the sum of its proper divisors (14560211).

78982189 is a wasteful number, since it uses less digits than its factorization.

78982189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

The product of its digits is 580608, while the sum is 52.

The square root of 78982189 is about 8887.1924138054. The cubic root of 78982189 is about 429.0517937984.

The spelling of 78982189 in words is "seventy-eight million, nine hundred eighty-two thousand, one hundred eighty-nine".