109188340 has 12 divisors (see below), whose sum is σ = 229295556. Its totient is φ = 43675328.

The previous prime is 109188329. The next prime is 109188347. The reversal of 109188340 is 43881901.

109188340 = 2691² + 2692² + ... + 2705².

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 96314596 = 3588^2 + 9814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 109188296 and 109188305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109188347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2729689 + ... + 2729728.

It is an arithmetic number, because the mean of its divisors is an integer number (19107963).

Almost surely, 2^109188340 is an apocalyptic number.

109188340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109188340 is an abundant number, since it is smaller than the sum of its proper divisors (120107216).

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

109188340 is a wasteful number, since it uses less digits than its factorization.

109188340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459426 (or 5459424 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 109188340 is about 10449.3224660741. The cubic root of 109188340 is about 477.9605891773.

The spelling of 109188340 in words is "one hundred nine million, one hundred eighty-eight thousand, three hundred forty".