128220895 has 16 divisors (see below), whose sum is σ = 168975360. Its totient is φ = 92628000.

The previous prime is 128220887. The next prime is 128220941. The reversal of 128220895 is 598022821.

It is not a de Polignac number, because 128220895 - 2³ = 128220887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (10560960).

Almost surely, 2^128220895 is an apocalyptic number.

128220895 is a deficient number, since it is larger than the sum of its proper divisors (40754465).

128220895 is a wasteful number, since it uses less digits than its factorization.

128220895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15606.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 128220895 is about 11323.4665628508. The cubic root of 128220895 is about 504.2581598708.

The spelling of 128220895 in words is "one hundred twenty-eight million, two hundred twenty thousand, eight hundred ninety-five".