28872340113 has 4 divisors (see below), whose sum is σ = 38496453488. Its totient is φ = 19248226740.

The previous prime is 28872340087. The next prime is 28872340121. The reversal of 28872340113 is 31104327882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28872340113 - 2¹³ = 28872331921 is a prime.

It is a super-2 number, since 2×28872340113² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872340163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812056683 + ... + 4812056688.

It is an arithmetic number, because the mean of its divisors is an integer number (9624113372).

Almost surely, 2^28872340113 is an apocalyptic number.

It is an amenable number.

28872340113 is a deficient number, since it is larger than the sum of its proper divisors (9624113375).

28872340113 is an equidigital number, since it uses as much as digits as its factorization.

28872340113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624113374.

The product of its (nonzero) digits is 64512, while the sum is 39.

Adding to 28872340113 its reverse (31104327882), we get a palindrome (59976667995).

The spelling of 28872340113 in words is "twenty-eight billion, eight hundred seventy-two million, three hundred forty thousand, one hundred thirteen".