128019290 has 16 divisors (see below), whose sum is σ = 263354112. Its totient is φ = 43892304.

The previous prime is 128019289. The next prime is 128019323. The reversal of 128019290 is 92910821.

It is a happy number.

It is a super-2 number, since 2×128019290² = 32777877224208200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914354 + ... + 914493.

It is an arithmetic number, because the mean of its divisors is an integer number (16459632).

Almost surely, 2^128019290 is an apocalyptic number.

128019290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128019290 is an abundant number, since it is smaller than the sum of its proper divisors (135334822).

128019290 is a wasteful number, since it uses less digits than its factorization.

128019290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828861.

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

The square root of 128019290 is about 11314.5609724814. The cubic root of 128019290 is about 503.9937352249.

The spelling of 128019290 in words is "one hundred twenty-eight million, nineteen thousand, two hundred ninety".