128928142 has 16 divisors (see below), whose sum is σ = 228641760. Its totient is φ = 53349408.

The previous prime is 128928131. The next prime is 128928181. The reversal of 128928142 is 241829821.

It is a happy number.

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, 158373 + ... + 159184.

It is an arithmetic number, because the mean of its divisors is an integer number (14290110).

Almost surely, 2^128928142 is an apocalyptic number.

128928142 is a deficient number, since it is larger than the sum of its proper divisors (99713618).

128928142 is a wasteful number, since it uses less digits than its factorization.

128928142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317595.

The product of its digits is 18432, while the sum is 37.

The square root of 128928142 is about 11354.6528788863. The cubic root of 128928142 is about 505.1835975899.

The spelling of 128928142 in words is "one hundred twenty-eight million, nine hundred twenty-eight thousand, one hundred forty-two".