12189810 has 16 divisors (see below), whose sum is σ = 29255616. Its totient is φ = 3250608.

The previous prime is 12189809. The next prime is 12189817. The reversal of 12189810 is 1898121.

It is a super-2 number, since 2×12189810² = 297182935672200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 406327 = 12189810 / (1 + 2 + 1 + 8 + 9 + 8 + 1 + 0).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12189817) 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, 203134 + ... + 203193.

It is an arithmetic number, because the mean of its divisors is an integer number (1828476).

Almost surely, 2^12189810 is an apocalyptic number.

12189810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12189810 is an abundant number, since it is smaller than the sum of its proper divisors (17065806).

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

12189810 is a wasteful number, since it uses less digits than its factorization.

12189810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406337.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 12189810 is about 3491.3908403386. The cubic root of 12189810 is about 230.1436405831.

The spelling of 12189810 in words is "twelve million, one hundred eighty-nine thousand, eight hundred ten".