23128655 has 8 divisors (see below), whose sum is σ = 30277584. Its totient is φ = 16820800.

The previous prime is 23128613. The next prime is 23128657. The reversal of 23128655 is 55682132.

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

It is not a de Polignac number, because 23128655 - 2¹² = 23124559 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 (23128657) 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, 210206 + ... + 210315.

It is an arithmetic number, because the mean of its divisors is an integer number (3784698).

Almost surely, 2^23128655 is an apocalyptic number.

23128655 is a deficient number, since it is larger than the sum of its proper divisors (7148929).

23128655 is a wasteful number, since it uses less digits than its factorization.

23128655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420537.

The product of its digits is 14400, while the sum is 32.

The square root of 23128655 is about 4809.2260292068. The cubic root of 23128655 is about 284.9159698918.

The spelling of 23128655 in words is "twenty-three million, one hundred twenty-eight thousand, six hundred fifty-five".