23135128 has 8 divisors (see below), whose sum is σ = 43378380. Its totient is φ = 11567560.

The previous prime is 23135107. The next prime is 23135129. The reversal of 23135128 is 82153132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23135129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445938 + ... + 1445953.

Almost surely, 2^23135128 is an apocalyptic number.

It is an amenable number.

23135128 is a deficient number, since it is larger than the sum of its proper divisors (20243252).

23135128 is a wasteful number, since it uses less digits than its factorization.

23135128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891897 (or 2891893 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 23135128 is about 4809.8989594377. The cubic root of 23135128 is about 284.9425471549.

The spelling of 23135128 in words is "twenty-three million, one hundred thirty-five thousand, one hundred twenty-eight".