128905018 has 16 divisors (see below), whose sum is σ = 220107456. Its totient is φ = 56045440.

The previous prime is 128905009. The next prime is 128905027. The reversal of 128905018 is 810509821.

It is an interprime number because it is at equal distance from previous prime (128905009) and next prime (128905027).

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 7 ways as a sum of consecutive naturals, for example, 126871 + ... + 127882.

It is an arithmetic number, because the mean of its divisors is an integer number (13756716).

Almost surely, 2^128905018 is an apocalyptic number.

128905018 is a deficient number, since it is larger than the sum of its proper divisors (91202438).

128905018 is a wasteful number, since it uses less digits than its factorization.

128905018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254789.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 128905018 is about 11353.6345722416. The cubic root of 128905018 is about 505.1533932611.

The spelling of 128905018 in words is "one hundred twenty-eight million, nine hundred five thousand, eighteen".