127989855 has 128 divisors (see below), whose sum is σ = 285327360. Its totient is φ = 53084160.

The previous prime is 127989853. The next prime is 127989877. The reversal of 127989855 is 558989721.

It is not a de Polignac number, because 127989855 - 2¹ = 127989853 is a prime.

Its product of digits (1814400) is a multiple of the sum of its prime divisors (320).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127989853) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 497887 + ... + 498143.

It is an arithmetic number, because the mean of its divisors is an integer number (2229120).

Almost surely, 2^127989855 is an apocalyptic number.

127989855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

127989855 is an abundant number, since it is smaller than the sum of its proper divisors (157337505).

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

127989855 is a wasteful number, since it uses less digits than its factorization.

127989855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The square root of 127989855 is about 11313.2601402072. The cubic root of 127989855 is about 503.9551051280.

The spelling of 127989855 in words is "one hundred twenty-seven million, nine hundred eighty-nine thousand, eight hundred fifty-five".