128109830 has 32 divisors (see below), whose sum is σ = 237299328. Its totient is φ = 49766400.

The previous prime is 128109823. The next prime is 128109859. The reversal of 128109830 is 38901821.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 110534 + ... + 111686.

It is an arithmetic number, because the mean of its divisors is an integer number (7415604).

Almost surely, 2^128109830 is an apocalyptic number.

128109830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128109830 is a deficient number, since it is larger than the sum of its proper divisors (109189498).

128109830 is a wasteful number, since it uses less digits than its factorization.

128109830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 128109830 is about 11318.5613043355. The cubic root of 128109830 is about 504.1125215931.

The spelling of 128109830 in words is "one hundred twenty-eight million, one hundred nine thousand, eight hundred thirty".