12840189 has 8 divisors (see below), whose sum is σ = 17355072. Its totient is φ = 8442720.

The previous prime is 12840133. The next prime is 12840193. The reversal of 12840189 is 98104821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12840189 - 2⁸ = 12839933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840109) 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, 29097 + ... + 29534.

It is an arithmetic number, because the mean of its divisors is an integer number (2169384).

Almost surely, 2^12840189 is an apocalyptic number.

It is an amenable number.

12840189 is a deficient number, since it is larger than the sum of its proper divisors (4514883).

12840189 is an equidigital number, since it uses as much as digits as its factorization.

12840189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58707.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 12840189 is about 3583.3209457150. The cubic root of 12840189 is about 234.1659827546.

The spelling of 12840189 in words is "twelve million, eight hundred forty thousand, one hundred eighty-nine".