189380639 has 12 divisors (see below), whose sum is σ = 221787000. Its totient is φ = 161230608.

The previous prime is 189380623. The next prime is 189380647. The reversal of 189380639 is 936083981.

It is not a de Polignac number, because 189380639 - 2⁴ = 189380623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189380593 and 189380602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189380669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5669 + ... + 20270.

It is an arithmetic number, because the mean of its divisors is an integer number (18482250).

Almost surely, 2^189380639 is an apocalyptic number.

189380639 is a deficient number, since it is larger than the sum of its proper divisors (32406361).

189380639 is a wasteful number, since it uses less digits than its factorization.

189380639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26102 (or 26095 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 189380639 is about 13761.5638282864. The cubic root of 189380639 is about 574.2643537447.

The spelling of 189380639 in words is "one hundred eighty-nine million, three hundred eighty thousand, six hundred thirty-nine".