128738055 has 32 divisors (see below), whose sum is σ = 211308480. Its totient is φ = 66908160.

The previous prime is 128738039. The next prime is 128738069. The reversal of 128738055 is 550837821.

It is not a de Polignac number, because 128738055 - 2⁴ = 128738039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96795 + ... + 98115.

It is an arithmetic number, because the mean of its divisors is an integer number (6603390).

Almost surely, 2^128738055 is an apocalyptic number.

128738055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128738055 is a deficient number, since it is larger than the sum of its proper divisors (82570425).

128738055 is a wasteful number, since it uses less digits than its factorization.

128738055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 128738055 is about 11346.2793461117. The cubic root of 128738055 is about 504.9352006520.

The spelling of 128738055 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, fifty-five".