1109990 has 32 divisors (see below), whose sum is σ = 2320704. Its totient is φ = 374400.

The previous prime is 1109987. The next prime is 1110007. The reversal of 1109990 is 999011.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6992 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (72522).

2^1109990 is an apocalyptic number.

1109990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1109990 is an abundant number, since it is smaller than the sum of its proper divisors (1210714).

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

1109990 is a wasteful number, since it uses less digits than its factorization.

1109990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 1109990 is about 1053.5606294846. The cubic root of 1109990 is about 103.5395696133.

The spelling of 1109990 in words is "one million, one hundred nine thousand, nine hundred ninety".