128145838 has 16 divisors (see below), whose sum is σ = 202603680. Its totient is φ = 60694816.

The previous prime is 128145833. The next prime is 128145839. The reversal of 128145838 is 838541821.

It is a self number, because there is not a number n which added to its sum of digits gives 128145838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128145833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17770 + ... + 23917.

It is an arithmetic number, because the mean of its divisors is an integer number (12662730).

Almost surely, 2^128145838 is an apocalyptic number.

128145838 is a deficient number, since it is larger than the sum of its proper divisors (74457842).

128145838 is a wasteful number, since it uses less digits than its factorization.

128145838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41771.

The product of its digits is 61440, while the sum is 40.

The square root of 128145838 is about 11320.1518541051. The cubic root of 128145838 is about 504.1597476940.

The spelling of 128145838 in words is "one hundred twenty-eight million, one hundred forty-five thousand, eight hundred thirty-eight".