24728005 has 4 divisors (see below), whose sum is σ = 29673612. Its totient is φ = 19782400.

The previous prime is 24727999. The next prime is 24728023. The reversal of 24728005 is 50082742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50082742 = 2 ⋅25041371.

It can be written as a sum of positive squares in 2 ways, for example, as 5909761 + 18818244 = 2431^2 + 4338^2 .

It is not a de Polignac number, because 24728005 - 2¹¹ = 24725957 is a prime.

It is a super-2 number, since 2×24728005² = 1222948462560050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2472796 + ... + 2472805.

It is an arithmetic number, because the mean of its divisors is an integer number (7418403).

Almost surely, 2^24728005 is an apocalyptic number.

It is an amenable number.

24728005 is a deficient number, since it is larger than the sum of its proper divisors (4945607).

24728005 is an equidigital number, since it uses as much as digits as its factorization.

24728005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945606.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 24728005 is about 4972.7261135116. The cubic root of 24728005 is about 291.3374803988.

The spelling of 24728005 in words is "twenty-four million, seven hundred twenty-eight thousand, five".