23133890 has 16 divisors (see below), whose sum is σ = 44844408. Its totient is φ = 8541696.

The previous prime is 23133863. The next prime is 23133899. The reversal of 23133890 is 9833132.

It can be written as a sum of positive squares in 4 ways, for example, as 11648569 + 11485321 = 3413^2 + 3389^2 .

It is not an unprimeable number, because it can be changed into a prime (23133899) 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, 88847 + ... + 89106.

Almost surely, 2^23133890 is an apocalyptic number.

23133890 is a deficient number, since it is larger than the sum of its proper divisors (21710518).

23133890 is a wasteful number, since it uses less digits than its factorization.

23133890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177973.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 23133890 is about 4809.7702647840. The cubic root of 23133890 is about 284.9374644777.

The spelling of 23133890 in words is "twenty-three million, one hundred thirty-three thousand, eight hundred ninety".