128990210 has 16 divisors (see below), whose sum is σ = 242277696. Its totient is φ = 49352688.

The previous prime is 128990207. The next prime is 128990219. The reversal of 128990210 is 12099821.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128990219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280184 + ... + 280643.

It is an arithmetic number, because the mean of its divisors is an integer number (15142356).

Almost surely, 2^128990210 is an apocalyptic number.

128990210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128990210 is a deficient number, since it is larger than the sum of its proper divisors (113287486).

128990210 is a wasteful number, since it uses less digits than its factorization.

128990210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560857.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 128990210 is about 11357.3857027047. The cubic root of 128990210 is about 505.2646523146.

The spelling of 128990210 in words is "one hundred twenty-eight million, nine hundred ninety thousand, two hundred ten".