23668890 has 64 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 5276160.

The previous prime is 23668847. The next prime is 23668907. The reversal of 23668890 is 9886632.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7236 + ... + 9984.

It is an arithmetic number, because the mean of its divisors is an integer number (1039500).

Almost surely, 2^23668890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23668890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33264000).

23668890 is an abundant number, since it is smaller than the sum of its proper divisors (42859110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23668890 is a wasteful number, since it uses less digits than its factorization.

23668890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 23668890 is about 4865.0683448437. The cubic root of 23668890 is about 287.1172575452.

The spelling of 23668890 in words is "twenty-three million, six hundred sixty-eight thousand, eight hundred ninety".