1123638 has 8 divisors (see below), whose sum is σ = 2247288. Its totient is φ = 374544.

The previous prime is 1123637. The next prime is 1123651. The reversal of 1123638 is 8363211.

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

1123638 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123631) 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, 93631 + ... + 93642.

It is an arithmetic number, because the mean of its divisors is an integer number (280911).

2^1123638 is an apocalyptic number.

1123638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1123638 is a wasteful number, since it uses less digits than its factorization.

1123638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187278.

The product of its digits is 864, while the sum is 24.

The square root of 1123638 is about 1060.0179243768. The cubic root of 1123638 is about 103.9622027342.

Adding to 1123638 its reverse (8363211), we get a palindrome (9486849).

The spelling of 1123638 in words is "one million, one hundred twenty-three thousand, six hundred thirty-eight".