12189738 has 16 divisors (see below), whose sum is σ = 26595936. Its totient is φ = 3693840.

The previous prime is 12189733. The next prime is 12189757. The reversal of 12189738 is 83798121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12189696 and 12189705.

It is not an unprimeable number, because it can be changed into a prime (12189733) 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, 92281 + ... + 92412.

It is an arithmetic number, because the mean of its divisors is an integer number (1662246).

Almost surely, 2^12189738 is an apocalyptic number.

12189738 is an abundant number, since it is smaller than the sum of its proper divisors (14406198).

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

12189738 is a wasteful number, since it uses less digits than its factorization.

12189738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184709.

The product of its digits is 24192, while the sum is 39.

The square root of 12189738 is about 3491.3805292463. The cubic root of 12189738 is about 230.1431874621.

The spelling of 12189738 in words is "twelve million, one hundred eighty-nine thousand, seven hundred thirty-eight".