12189402 has 24 divisors (see below), whose sum is σ = 27559584. Its totient is φ = 3886344.

The previous prime is 12189371. The next prime is 12189439. The reversal of 12189402 is 20498121.

It is a super-3 number, since 3×12189402³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14308 + ... + 15135.

It is an arithmetic number, because the mean of its divisors is an integer number (1148316).

Almost surely, 2^12189402 is an apocalyptic number.

12189402 is an abundant number, since it is smaller than the sum of its proper divisors (15370182).

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

12189402 is a wasteful number, since it uses less digits than its factorization.

12189402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29474 (or 29471 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12189402 is about 3491.3324104130. The cubic root of 12189402 is about 230.1410728741.

The spelling of 12189402 in words is "twelve million, one hundred eighty-nine thousand, four hundred two".