128188914 has 16 divisors (see below), whose sum is σ = 293003328. Its totient is φ = 36625392.

The previous prime is 128188901. The next prime is 128188939. The reversal of 128188914 is 419881821.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3052117 = 128188914 / (1 + 2 + 8 + 1 + 8 + 8 + 9 + 1 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526017 + ... + 1526100.

It is an arithmetic number, because the mean of its divisors is an integer number (18312708).

Almost surely, 2^128188914 is an apocalyptic number.

128188914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128188914 is an abundant number, since it is smaller than the sum of its proper divisors (164814414).

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

128188914 is a wasteful number, since it uses less digits than its factorization.

128188914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052129.

The product of its digits is 36864, while the sum is 42.

The square root of 128188914 is about 11322.0543188946. The cubic root of 128188914 is about 504.2162321721.

The spelling of 128188914 in words is "one hundred twenty-eight million, one hundred eighty-eight thousand, nine hundred fourteen".