23749985 has 16 divisors (see below), whose sum is σ = 33696000. Its totient is φ = 15723456.

The previous prime is 23749963. The next prime is 23749987. The reversal of 23749985 is 58994732.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-23749985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23749987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10685 + ... + 12714.

It is an arithmetic number, because the mean of its divisors is an integer number (2106000).

Almost surely, 2^23749985 is an apocalyptic number.

It is an amenable number.

23749985 is a deficient number, since it is larger than the sum of its proper divisors (9946015).

23749985 is a wasteful number, since it uses less digits than its factorization.

23749985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23440.

The product of its digits is 544320, while the sum is 47.

The square root of 23749985 is about 4873.3956334367. The cubic root of 23749985 is about 287.4447934325. Note that the first 3 decimals are identical.

The spelling of 23749985 in words is "twenty-three million, seven hundred forty-nine thousand, nine hundred eighty-five".