28947634213 has 8 divisors (see below), whose sum is σ = 29386814040. Its totient is φ = 28510986240.

The previous prime is 28947634211. The next prime is 28947634223. The reversal of 28947634213 is 31243674982.

It can be written as a sum of positive squares in 4 ways, for example, as 1306244164 + 27641390049 = 36142^2 + 166257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28947634213 - 2¹ = 28947634211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947634211) 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 7 ways as a sum of consecutive naturals, for example, 609918 + ... + 655663.

It is an arithmetic number, because the mean of its divisors is an integer number (3673351755).

Almost surely, 2^28947634213 is an apocalyptic number.

It is an amenable number.

28947634213 is a deficient number, since it is larger than the sum of its proper divisors (439179827).

28947634213 is a wasteful number, since it uses less digits than its factorization.

28947634213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265927.

The product of its digits is 1741824, while the sum is 49.

The spelling of 28947634213 in words is "twenty-eight billion, nine hundred forty-seven million, six hundred thirty-four thousand, two hundred thirteen".