109090820 has 12 divisors (see below), whose sum is σ = 229090764. Its totient is φ = 43636320.

The previous prime is 109090789. The next prime is 109090897. The reversal of 109090820 is 28090901.

It can be written as a sum of positive squares in 2 ways, for example, as 34199104 + 74891716 = 5848^2 + 8654^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727251 + ... + 2727290.

It is an arithmetic number, because the mean of its divisors is an integer number (19090897).

Almost surely, 2^109090820 is an apocalyptic number.

109090820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109090820 is an abundant number, since it is smaller than the sum of its proper divisors (119999944).

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

109090820 is a wasteful number, since it uses less digits than its factorization.

109090820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454550 (or 5454548 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 109090820 is about 10444.6550924384. The cubic root of 109090820 is about 477.8182522449.

The spelling of 109090820 in words is "one hundred nine million, ninety thousand, eight hundred twenty".