Search a number
-
+
12238837 = 13941449
BaseRepresentation
bin101110101011…
…111111110101
3212000210112021
4232223333311
511113120322
61114153141
7206012512
oct56537765
925023467
1012238837
1169aa246
1241227b1
1326c6920
1418a8309
15111b4c7
hexbabff5

12238837 has 4 divisors (see below), whose sum is σ = 13180300. Its totient is φ = 11297376.

The previous prime is 12238799. The next prime is 12238843. The reversal of 12238837 is 73883221.

12238837 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73883221 = 619119359.

It can be written as a sum of positive squares in 2 ways, for example, as 6507601 + 5731236 = 2551^2 + 2394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12238837 is a prime.

It is a super-2 number, since 2×122388372 = 299578262225138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12238867) 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, 470712 + ... + 470737.

It is an arithmetic number, because the mean of its divisors is an integer number (3295075).

Almost surely, 212238837 is an apocalyptic number.

It is an amenable number.

12238837 is a deficient number, since it is larger than the sum of its proper divisors (941463).

12238837 is an equidigital number, since it uses as much as digits as its factorization.

12238837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941462.

The product of its digits is 16128, while the sum is 34.

The square root of 12238837 is about 3498.4049222467. The cubic root of 12238837 is about 230.4517711452.

The spelling of 12238837 in words is "twelve million, two hundred thirty-eight thousand, eight hundred thirty-seven".

Divisors: 1 13 941449 12238837