109198128 has 80 divisors (see below), whose sum is σ = 306924800. Its totient is φ = 33253632.

The previous prime is 109198099. The next prime is 109198139. The reversal of 109198128 is 821891901.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63423 + ... + 65121.

It is an arithmetic number, because the mean of its divisors is an integer number (3836560).

Almost surely, 2^109198128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109198128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153462400).

109198128 is an abundant number, since it is smaller than the sum of its proper divisors (197726672).

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

109198128 is a wasteful number, since it uses less digits than its factorization.

109198128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 109198128 is about 10449.7908113034. The cubic root of 109198128 is about 477.9748707342.

The spelling of 109198128 in words is "one hundred nine million, one hundred ninety-eight thousand, one hundred twenty-eight".