24728089 has 4 divisors (see below), whose sum is σ = 24908724. Its totient is φ = 24547456.

The previous prime is 24728087. The next prime is 24728131. The reversal of 24728089 is 98082742.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9455625 + 15272464 = 3075^2 + 3908^2 .

It is a cyclic number.

It is not a de Polignac number, because 24728089 - 2¹ = 24728087 is a prime.

It is a super-2 number, since 2×24728089² = 1222956771183842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24728083) 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, 90112 + ... + 90385.

It is an arithmetic number, because the mean of its divisors is an integer number (6227181).

Almost surely, 2^24728089 is an apocalyptic number.

It is an amenable number.

24728089 is a deficient number, since it is larger than the sum of its proper divisors (180635).

24728089 is a wasteful number, since it uses less digits than its factorization.

24728089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180634.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 24728089 is about 4972.7345595758. The cubic root of 24728089 is about 291.3378102855.

The spelling of 24728089 in words is "twenty-four million, seven hundred twenty-eight thousand, eighty-nine".