23216724 has 18 divisors (see below), whose sum is σ = 58686810. Its totient is φ = 7738896.

The previous prime is 23216717. The next prime is 23216741. The reversal of 23216724 is 42761232.

It can be written as a sum of positive squares in only one way, i.e., 23213124 + 3600 = 4818^2 + 60^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322419 + ... + 322490.

Almost surely, 2^23216724 is an apocalyptic number.

It is an amenable number.

23216724 is an abundant number, since it is smaller than the sum of its proper divisors (35470086).

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

23216724 is a wasteful number, since it uses less digits than its factorization.

23216724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644919 (or 644914 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 23216724 is about 4818.3735845200. The cubic root of 23216724 is about 285.2771449953.

Adding to 23216724 its reverse (42761232), we get a palindrome (65977956).

It can be divided in two parts, 2321 and 6724, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 23216724 in words is "twenty-three million, two hundred sixteen thousand, seven hundred twenty-four".