128038555 has 8 divisors (see below), whose sum is σ = 156250800. Its totient is φ = 100694496.

The previous prime is 128038553. The next prime is 128038571. The reversal of 128038555 is 555830821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128038555 - 2¹ = 128038553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128038553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216720 + ... + 217309.

It is an arithmetic number, because the mean of its divisors is an integer number (19531350).

Almost surely, 2^128038555 is an apocalyptic number.

128038555 is a deficient number, since it is larger than the sum of its proper divisors (28212245).

128038555 is an equidigital number, since it uses as much as digits as its factorization.

128038555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434093.

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 128038555 is about 11315.4122770671. The cubic root of 128038555 is about 504.0190151451.

The spelling of 128038555 in words is "one hundred twenty-eight million, thirty-eight thousand, five hundred fifty-five".