128111478 has 16 divisors (see below), whose sum is σ = 279516096. Its totient is φ = 38821640.

The previous prime is 128111461. The next prime is 128111497. The reversal of 128111478 is 874111821.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 970476 + ... + 970607.

It is an arithmetic number, because the mean of its divisors is an integer number (17469756).

Almost surely, 2^128111478 is an apocalyptic number.

128111478 is an abundant number, since it is smaller than the sum of its proper divisors (151404618).

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

128111478 is a wasteful number, since it uses less digits than its factorization.

128111478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941099.

The product of its digits is 3584, while the sum is 33.

The square root of 128111478 is about 11318.6341048733. The cubic root of 128111478 is about 504.1146832120.

The spelling of 128111478 in words is "one hundred twenty-eight million, one hundred eleven thousand, four hundred seventy-eight".