23690 has 16 divisors (see below), whose sum is σ = 44928. Its totient is φ = 8976.

The previous prime is 23689. The next prime is 23719. The reversal of 23690 is 9632.

It is a happy number.

It is a super-2 number, since 2×23690² = 1122432200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179 + ... + 281.

It is an arithmetic number, because the mean of its divisors is an integer number (2808).

2²³⁶⁹⁰ is an apocalyptic number.

23690 is a deficient number, since it is larger than the sum of its proper divisors (21238).

23690 is a wasteful number, since it uses less digits than its factorization.

23690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 23690 is about 153.9155612666. The cubic root of 23690 is about 28.7202590997.

The spelling of 23690 in words is "twenty-three thousand, six hundred ninety".