128055590 has 32 divisors (see below), whose sum is σ = 256798080. Its totient is φ = 45650304.

The previous prime is 128055583. The next prime is 128055593. The reversal of 128055590 is 95550821.

It is a self number, because there is not a number n which added to its sum of digits gives 128055590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128055593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13214 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (8024940).

Almost surely, 2^128055590 is an apocalyptic number.

128055590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128055590 is an abundant number, since it is smaller than the sum of its proper divisors (128742490).

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

128055590 is a wasteful number, since it uses less digits than its factorization.

128055590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34016.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 128055590 is about 11316.1649864254. The cubic root of 128055590 is about 504.0413667021.

The spelling of 128055590 in words is "one hundred twenty-eight million, fifty-five thousand, five hundred ninety".