128089806 has 32 divisors (see below), whose sum is σ = 287884800. Its totient is φ = 37698144.

The previous prime is 128089789. The next prime is 128089823. The reversal of 128089806 is 608980821.

It is an interprime number because it is at equal distance from previous prime (128089789) and next prime (128089823).

It is a super-2 number, since 2×128089806² = 32813996802235272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33906 + ... + 37493.

It is an arithmetic number, because the mean of its divisors is an integer number (8996400).

Almost surely, 2^128089806 is an apocalyptic number.

128089806 is an abundant number, since it is smaller than the sum of its proper divisors (159794994).

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

128089806 is a wasteful number, since it uses less digits than its factorization.

128089806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71440.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 128089806 is about 11317.6767050486. The cubic root of 128089806 is about 504.0862553935.

The spelling of 128089806 in words is "one hundred twenty-eight million, eighty-nine thousand, eight hundred six".