128845389 has 16 divisors (see below), whose sum is σ = 174225600. Its totient is φ = 84686976.

The previous prime is 128845373. The next prime is 128845399. The reversal of 128845389 is 983548821.

It is not a de Polignac number, because 128845389 - 2⁴ = 128845373 is a prime.

It is a super-2 number, since 2×128845389² = 33202268533122642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128845309) 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, 173982 + ... + 174720.

It is an arithmetic number, because the mean of its divisors is an integer number (10889100).

Almost surely, 2^128845389 is an apocalyptic number.

It is an amenable number.

128845389 is a deficient number, since it is larger than the sum of its proper divisors (45380211).

128845389 is an equidigital number, since it uses as much as digits as its factorization.

128845389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484.

The product of its digits is 552960, while the sum is 48.

The square root of 128845389 is about 11351.0082812057. The cubic root of 128845389 is about 505.0754898095.

The spelling of 128845389 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, three hundred eighty-nine".