23009724 has 48 divisors (see below), whose sum is σ = 59959200. Its totient is φ = 7630848.

The previous prime is 23009713. The next prime is 23009747. The reversal of 23009724 is 42790032.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27342 + ... + 28170.

It is an arithmetic number, because the mean of its divisors is an integer number (1249150).

Almost surely, 2^23009724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23009724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29979600).

23009724 is an abundant number, since it is smaller than the sum of its proper divisors (36949476).

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

23009724 is a wasteful number, since it uses less digits than its factorization.

23009724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 23009724 is about 4796.8452132626. The cubic root of 23009724 is about 284.4267702551.

Adding to 23009724 its reverse (42790032), we get a palindrome (65799756).

The spelling of 23009724 in words is "twenty-three million, nine thousand, seven hundred twenty-four".