64423128 has 128 divisors (see below), whose sum is σ = 204042240. Its totient is φ = 16464000.

The previous prime is 64423127. The next prime is 64423169. The reversal of 64423128 is 82132446.

64423128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 64423095 and 64423104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64423127) 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 31 ways as a sum of consecutive naturals, for example, 130963 + ... + 131453.

It is an arithmetic number, because the mean of its divisors is an integer number (1594080).

Almost surely, 2^64423128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64423128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102021120).

64423128 is an abundant number, since it is smaller than the sum of its proper divisors (139619112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64423128 is a wasteful number, since it uses less digits than its factorization.

64423128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 585 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 64423128 is about 8026.4019336188. The cubic root of 64423128 is about 400.8795810917.

The spelling of 64423128 in words is "sixty-four million, four hundred twenty-three thousand, one hundred twenty-eight".