28917274933 has 4 divisors (see below), whose sum is σ = 29462883948. Its totient is φ = 28371665920.

The previous prime is 28917274931. The next prime is 28917274963. The reversal of 28917274933 is 33947271982.

It is a happy number.

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 18648087364 + 10269187569 = 136558^2 + 101337^2 .

It is a cyclic number.

It is not a de Polignac number, because 28917274933 - 2¹ = 28917274931 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 (28917274931) 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, 272804428 + ... + 272804533.

It is an arithmetic number, because the mean of its divisors is an integer number (7365720987).

Almost surely, 2^28917274933 is an apocalyptic number.

It is an amenable number.

28917274933 is a deficient number, since it is larger than the sum of its proper divisors (545609015).

28917274933 is an equidigital number, since it uses as much as digits as its factorization.

28917274933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545609014.

The product of its digits is 4572288, while the sum is 55.

The spelling of 28917274933 in words is "twenty-eight billion, nine hundred seventeen million, two hundred seventy-four thousand, nine hundred thirty-three".