28274764821 has 8 divisors (see below), whose sum is σ = 38718597024. Its totient is φ = 18340387920.

The previous prime is 28274764813. The next prime is 28274764849. The reversal of 28274764821 is 12846747282.

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

It is not a de Polignac number, because 28274764821 - 2³ = 28274764813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274764421) 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 7 ways as a sum of consecutive naturals, for example, 127363695 + ... + 127363916.

It is an arithmetic number, because the mean of its divisors is an integer number (4839824628).

Almost surely, 2^28274764821 is an apocalyptic number.

It is an amenable number.

28274764821 is a deficient number, since it is larger than the sum of its proper divisors (10443832203).

28274764821 is a wasteful number, since it uses less digits than its factorization.

28274764821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254727651.

The product of its digits is 2408448, while the sum is 51.

The spelling of 28274764821 in words is "twenty-eight billion, two hundred seventy-four million, seven hundred sixty-four thousand, eight hundred twenty-one".