23128005 has 8 divisors (see below), whose sum is σ = 37004832. Its totient is φ = 12334928.

The previous prime is 23127991. The next prime is 23128009. The reversal of 23128005 is 50082132.

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

It is a cyclic number.

It is not a de Polignac number, because 23128005 - 2⁹ = 23127493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128009) 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 7 ways as a sum of consecutive naturals, for example, 770919 + ... + 770948.

It is an arithmetic number, because the mean of its divisors is an integer number (4625604).

Almost surely, 2^23128005 is an apocalyptic number.

It is an amenable number.

23128005 is a deficient number, since it is larger than the sum of its proper divisors (13876827).

23128005 is a wasteful number, since it uses less digits than its factorization.

23128005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541875.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 23128005 is about 4809.1584502904. The cubic root of 23128005 is about 284.9133008057.

The spelling of 23128005 in words is "twenty-three million, one hundred twenty-eight thousand, five".