128190320 has 20 divisors (see below), whose sum is σ = 298042680. Its totient is φ = 51276096.

The previous prime is 128190299. The next prime is 128190331. The reversal of 128190320 is 23091821.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 128190320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801110 + ... + 801269.

It is an arithmetic number, because the mean of its divisors is an integer number (14902134).

Almost surely, 2^128190320 is an apocalyptic number.

128190320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128190320 is an abundant number, since it is smaller than the sum of its proper divisors (169852360).

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

128190320 is a wasteful number, since it uses less digits than its factorization.

128190320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602392 (or 1602386 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 128190320 is about 11322.1164099297. The cubic root of 128190320 is about 504.2180756114.

The spelling of 128190320 in words is "one hundred twenty-eight million, one hundred ninety thousand, three hundred twenty".