128418975 has 36 divisors (see below), whose sum is σ = 232331112. Its totient is φ = 67800000.

The previous prime is 128418943. The next prime is 128418977. The reversal of 128418975 is 579814821.

It is not a de Polignac number, because 128418975 - 2⁵ = 128418943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (161280) is a multiple of the sum of its prime divisors (5760).

It is a self number, because there is not a number n which added to its sum of digits gives 128418975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128418977) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19900 + ... + 25550.

It is an arithmetic number, because the mean of its divisors is an integer number (6453642).

Almost surely, 2^128418975 is an apocalyptic number.

128418975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128418975 is a deficient number, since it is larger than the sum of its proper divisors (103912137).

128418975 is a wasteful number, since it uses less digits than its factorization.

128418975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768 (or 5760 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 128418975 is about 11332.2096256644. The cubic root of 128418975 is about 504.5176913249.

The spelling of 128418975 in words is "one hundred twenty-eight million, four hundred eighteen thousand, nine hundred seventy-five".