64128339 has 24 divisors (see below), whose sum is σ = 102772800. Its totient is φ = 38203440.

The previous prime is 64128283. The next prime is 64128343. The reversal of 64128339 is 93382146.

64128339 is a `hidden beast` number, since 641 + 2 + 8 + 3 + 3 + 9 = 666.

64128339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64128339 - 2¹⁷ = 63997267 is a prime.

It is a super-2 number, since 2×64128339² = 8224887725797842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64128359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352 + ... + 11330.

It is an arithmetic number, because the mean of its divisors is an integer number (4282200).

Almost surely, 2^64128339 is an apocalyptic number.

64128339 is a deficient number, since it is larger than the sum of its proper divisors (38644461).

64128339 is a wasteful number, since it uses less digits than its factorization.

64128339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055 (or 11052 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 64128339 is about 8008.0171703113. The cubic root of 64128339 is about 400.2671943948.

The spelling of 64128339 in words is "sixty-four million, one hundred twenty-eight thousand, three hundred thirty-nine".