23126728 has 16 divisors (see below), whose sum is σ = 43641180. Its totient is φ = 11489088.

The previous prime is 23126723. The next prime is 23126729. The reversal of 23126728 is 82762132.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 1205604 = 4682^2 + 1098^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23126728.

It is not an unprimeable number, because it can be changed into a prime (23126723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7951 + ... + 10462.

Almost surely, 2^23126728 is an apocalyptic number.

It is an amenable number.

23126728 is a deficient number, since it is larger than the sum of its proper divisors (20514452).

23126728 is a wasteful number, since it uses less digits than its factorization.

23126728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18576 (or 18572 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 23126728 is about 4809.0256809462. The cubic root of 23126728 is about 284.9080569324.

It can be divided in two parts, 2312 and 6728, that multiplied together give a square (15555136 = 3944²).

The spelling of 23126728 in words is "twenty-three million, one hundred twenty-six thousand, seven hundred twenty-eight".