23205128 has 8 divisors (see below), whose sum is σ = 43509630. Its totient is φ = 11602560.

The previous prime is 23205109. The next prime is 23205181. The reversal of 23205128 is 82150232.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 145924 = 4802^2 + 382^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450313 + ... + 1450328.

Almost surely, 2^23205128 is an apocalyptic number.

It is an amenable number.

23205128 is a deficient number, since it is larger than the sum of its proper divisors (20304502).

23205128 is a wasteful number, since it uses less digits than its factorization.

23205128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900647 (or 2900643 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 23205128 is about 4817.1701236307. The cubic root of 23205128 is about 285.2296415277.

The spelling of 23205128 in words is "twenty-three million, two hundred five thousand, one hundred twenty-eight".