109440890 has 32 divisors (see below), whose sum is σ = 217331856. Its totient is φ = 39421440.

The previous prime is 109440869. The next prime is 109440901. The reversal of 109440890 is 98044901.

It can be written as a sum of positive squares in 8 ways, for example, as 11648569 + 97792321 = 3413^2 + 9889^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109440890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4937 + ... + 15596.

Almost surely, 2^109440890 is an apocalyptic number.

109440890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109440890 is a deficient number, since it is larger than the sum of its proper divisors (107890966).

109440890 is a wasteful number, since it uses less digits than its factorization.

109440890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20594.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 109440890 is about 10461.4000019118. The cubic root of 109440890 is about 478.3288092045.

The spelling of 109440890 in words is "one hundred nine million, four hundred forty thousand, eight hundred ninety".