Search a number
-
+
1389812 = 221918287
BaseRepresentation
bin101010011010011110100
32121121110112
411103103310
5323433222
645442152
714545634
oct5232364
92547415
101389812
1186a206
12570358
13398798
142826c4
151c6be2
hex1534f4

1389812 has 12 divisors (see below), whose sum is σ = 2560320. Its totient is φ = 658296.

The previous prime is 1389811. The next prime is 1389833. The reversal of 1389812 is 2189831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9068 + ... + 9219.

It is an arithmetic number, because the mean of its divisors is an integer number (213360).

21389812 is an apocalyptic number.

It is an amenable number.

1389812 is a deficient number, since it is larger than the sum of its proper divisors (1170508).

1389812 is a wasteful number, since it uses less digits than its factorization.

1389812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18310 (or 18308 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 1389812 is about 1178.9028797997. The cubic root of 1389812 is about 111.5968713125.

The spelling of 1389812 in words is "one million, three hundred eighty-nine thousand, eight hundred twelve".

Divisors: 1 2 4 19 38 76 18287 36574 73148 347453 694906 1389812