128544823 has 8 divisors (see below), whose sum is σ = 147611520. Its totient is φ = 110708280.

The previous prime is 128544761. The next prime is 128544827. The reversal of 128544823 is 328445821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128544823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128544827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307315 + ... + 307732.

It is an arithmetic number, because the mean of its divisors is an integer number (18451440).

Almost surely, 2^128544823 is an apocalyptic number.

128544823 is a deficient number, since it is larger than the sum of its proper divisors (19066697).

128544823 is a wasteful number, since it uses less digits than its factorization.

128544823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615077.

The product of its digits is 61440, while the sum is 37.

The square root of 128544823 is about 11337.7609341527. The cubic root of 128544823 is about 504.6824432323.

The spelling of 128544823 in words is "one hundred twenty-eight million, five hundred forty-four thousand, eight hundred twenty-three".