23128545 has 24 divisors (see below), whose sum is σ = 40678848. Its totient is φ = 11212960.

The previous prime is 23128537. The next prime is 23128549. The reversal of 23128545 is 54582132.

It is not a de Polignac number, because 23128545 - 2³ = 23128537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23128549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4557 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (1694952).

Almost surely, 2^23128545 is an apocalyptic number.

It is an amenable number.

23128545 is a deficient number, since it is larger than the sum of its proper divisors (17550303).

23128545 is a wasteful number, since it uses less digits than its factorization.

23128545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12773 (or 12762 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 23128545 is about 4809.2145928415. The cubic root of 23128545 is about 284.9155182038.

The spelling of 23128545 in words is "twenty-three million, one hundred twenty-eight thousand, five hundred forty-five".