128803845 has 16 divisors (see below), whose sum is σ = 211656960. Its totient is φ = 66838464.

The previous prime is 128803823. The next prime is 128803847. The reversal of 128803845 is 548308821.

It is not a de Polignac number, because 128803845 - 2⁵ = 128803813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128803847) by changing a digit.

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, 115485 + ... + 116594.

It is an arithmetic number, because the mean of its divisors is an integer number (13228560).

Almost surely, 2^128803845 is an apocalyptic number.

128803845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128803845 is a deficient number, since it is larger than the sum of its proper divisors (82853115).

128803845 is a wasteful number, since it uses less digits than its factorization.

128803845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232124.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 128803845 is about 11349.1781640787. The cubic root of 128803845 is about 505.0211996459.

The spelling of 128803845 in words is "one hundred twenty-eight million, eight hundred three thousand, eight hundred forty-five".