28204338813 has 64 divisors (see below), whose sum is σ = 44273295360. Its totient is φ = 15640215552.

The previous prime is 28204338809. The next prime is 28204338817. The reversal of 28204338813 is 31883340282.

It is an interprime number because it is at equal distance from previous prime (28204338809) and next prime (28204338817).

It is not a de Polignac number, because 28204338813 - 2² = 28204338809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28204338817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35387731 + ... + 35388527.

It is an arithmetic number, because the mean of its divisors is an integer number (691770240).

Almost surely, 2^28204338813 is an apocalyptic number.

It is an amenable number.

28204338813 is a deficient number, since it is larger than the sum of its proper divisors (16068956547).

28204338813 is a wasteful number, since it uses less digits than its factorization.

28204338813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 28204338813 in words is "twenty-eight billion, two hundred four million, three hundred thirty-eight thousand, eight hundred thirteen".