128112774 has 16 divisors (see below), whose sum is σ = 258244608. Its totient is φ = 42367752.

The previous prime is 128112773. The next prime is 128112791. The reversal of 128112774 is 477211821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128112773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83302 + ... + 84825.

It is an arithmetic number, because the mean of its divisors is an integer number (16140288).

Almost surely, 2^128112774 is an apocalyptic number.

128112774 is an abundant number, since it is smaller than the sum of its proper divisors (130131834).

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

128112774 is a wasteful number, since it uses less digits than its factorization.

128112774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168259.

The product of its digits is 6272, while the sum is 33.

The square root of 128112774 is about 11318.6913554527. The cubic root of 128112774 is about 504.1163831128.

The spelling of 128112774 in words is "one hundred twenty-eight million, one hundred twelve thousand, seven hundred seventy-four".