28947244244 has 18 divisors (see below), whose sum is σ = 52407811470. Its totient is φ = 13973647072.

The previous prime is 28947244231. The next prime is 28947244301. The reversal of 28947244244 is 44244274982.

It can be written as a sum of positive squares in 3 ways, for example, as 10391355844 + 18555888400 = 101938^2 + 136220^2 .

It is a super-2 number, since 2×28947244244² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28947244192 and 28947244201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1824554 + ... + 1840350.

Almost surely, 2^28947244244 is an apocalyptic number.

It is an amenable number.

28947244244 is a deficient number, since it is larger than the sum of its proper divisors (23460567226).

28947244244 is an frugal number, since it uses more digits than its factorization.

28947244244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31627 (or 15828 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 50.

The spelling of 28947244244 in words is "twenty-eight billion, nine hundred forty-seven million, two hundred forty-four thousand, two hundred forty-four".