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12189908 = 2223132499
BaseRepresentation
bin101110100000…
…000011010100
3211221022102002
4232200003110
511110034113
61113134432
7205420043
oct56400324
924838362
1012189908
116976505
1240ba418
1326aa583
14189455a
15110bc58
hexba00d4

12189908 has 12 divisors (see below), whose sum is σ = 22260000. Its totient is φ = 5829912.

The previous prime is 12189907. The next prime is 12189911. The reversal of 12189908 is 80998121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66158 + ... + 66341.

It is an arithmetic number, because the mean of its divisors is an integer number (1855000).

Almost surely, 212189908 is an apocalyptic number.

It is an amenable number.

12189908 is a deficient number, since it is larger than the sum of its proper divisors (10070092).

12189908 is a wasteful number, since it uses less digits than its factorization.

12189908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132526 (or 132524 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12189908 is about 3491.4048748319. The cubic root of 12189908 is about 230.1442573281.

The spelling of 12189908 in words is "twelve million, one hundred eighty-nine thousand, nine hundred eight".

Divisors: 1 2 4 23 46 92 132499 264998 529996 3047477 6094954 12189908