23698 has 12 divisors (see below), whose sum is σ = 38682. Its totient is φ = 10880.

The previous prime is 23689. The next prime is 23719. The reversal of 23698 is 89632.

It can be written as a sum of positive squares in 3 ways, for example, as 20449 + 3249 = 143^2 + 57^2 .

It is an Ulam number.

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

It is an unprimeable number.

23698 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 5 ways as a sum of consecutive naturals, for example, 558 + ... + 598.

2²³⁶⁹⁸ is an apocalyptic number.

23698 is a deficient number, since it is larger than the sum of its proper divisors (14984).

23698 is a wasteful number, since it uses less digits than its factorization.

23698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 60 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 23698 is about 153.9415473483. The cubic root of 23698 is about 28.7234916341.

It can be divided in two parts, 2 and 3698, that multiplied together give a square (7396 = 86²).

The spelling of 23698 in words is "twenty-three thousand, six hundred ninety-eight".