1223838 has 48 divisors (see below), whose sum is σ = 3309696. Its totient is φ = 317520.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223838 is 8383221.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 945 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (68952).

2^1223838 is an apocalyptic number.

1223838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654848).

1223838 is an abundant number, since it is smaller than the sum of its proper divisors (2085858).

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

1223838 is a wasteful number, since it uses less digits than its factorization.

1223838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 906 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1223838 is about 1106.2721184229. The cubic root of 1223838 is about 106.9649053684.

The spelling of 1223838 in words is "one million, two hundred twenty-three thousand, eight hundred thirty-eight".