1109638 has 8 divisors (see below), whose sum is σ = 1752120. Its totient is φ = 525600.

The previous prime is 1109629. The next prime is 1109639. The reversal of 1109638 is 8369011.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109639) 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, 14563 + ... + 14638.

It is an arithmetic number, because the mean of its divisors is an integer number (219015).

2^1109638 is an apocalyptic number.

1109638 is a deficient number, since it is larger than the sum of its proper divisors (642482).

1109638 is a wasteful number, since it uses less digits than its factorization.

1109638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29222.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1109638 is about 1053.3935636788. The cubic root of 1109638 is about 103.5286236343.

The spelling of 1109638 in words is "one million, one hundred nine thousand, six hundred thirty-eight".