128489459 has 16 divisors (see below), whose sum is σ = 152349120. Its totient is φ = 106028160.

The previous prime is 128489453. The next prime is 128489467. The reversal of 128489459 is 954984821.

It is not a de Polignac number, because 128489459 - 2⁴ = 128489443 is a prime.

It is a super-2 number, since 2×128489459² = 33019082148225362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128489453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92897 + ... + 94269.

It is an arithmetic number, because the mean of its divisors is an integer number (9521820).

Almost surely, 2^128489459 is an apocalyptic number.

128489459 is a deficient number, since it is larger than the sum of its proper divisors (23859661).

128489459 is a wasteful number, since it uses less digits than its factorization.

128489459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870.

The product of its digits is 829440, while the sum is 50.

The square root of 128489459 is about 11335.3190956408. The cubic root of 128489459 is about 504.6099775857.

The spelling of 128489459 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, four hundred fifty-nine".