109442090 has 64 divisors (see below), whose sum is σ = 226851840. Its totient is φ = 37739520.

The previous prime is 109442087. The next prime is 109442101. The reversal of 109442090 is 90244901.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 99584 + ... + 100676.

It is an arithmetic number, because the mean of its divisors is an integer number (3544560).

Almost surely, 2^109442090 is an apocalyptic number.

109442090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109442090 is an abundant number, since it is smaller than the sum of its proper divisors (117409750).

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

109442090 is a wasteful number, since it uses less digits than its factorization.

109442090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 109442090 is about 10461.4573554548. The cubic root of 109442090 is about 478.3305574617.

Adding to 109442090 its reverse (90244901), we get a palindrome (199686991).

The spelling of 109442090 in words is "one hundred nine million, four hundred forty-two thousand, ninety".