23688729 has 12 divisors (see below), whose sum is σ = 34445632. Its totient is φ = 15687000.

The previous prime is 23688727. The next prime is 23688751. The reversal of 23688729 is 92788632.

It is not a de Polignac number, because 23688729 - 2¹ = 23688727 is a prime.

It is a super-2 number, since 2×23688729² = 1122311763270882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23688727) 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 11 ways as a sum of consecutive naturals, for example, 7357 + ... + 10074.

Almost surely, 2^23688729 is an apocalyptic number.

It is an amenable number.

23688729 is a deficient number, since it is larger than the sum of its proper divisors (10756903).

23688729 is a wasteful number, since it uses less digits than its factorization.

23688729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17588 (or 17585 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 23688729 is about 4867.1068408244. The cubic root of 23688729 is about 287.1974546385.

The spelling of 23688729 in words is "twenty-three million, six hundred eighty-eight thousand, seven hundred twenty-nine".