27728765252 has 6 divisors (see below), whose sum is σ = 48525339198. Its totient is φ = 13864382624.

The previous prime is 27728765249. The next prime is 27728765261. The reversal of 27728765252 is 25256782772.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25861142596 + 1867622656 = 160814^2 + 43216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27728765194 and 27728765203.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3466095653 + ... + 3466095660.

It is an arithmetic number, because the mean of its divisors is an integer number (8087556533).

Almost surely, 2^27728765252 is an apocalyptic number.

It is an amenable number.

27728765252 is a deficient number, since it is larger than the sum of its proper divisors (20796573946).

27728765252 is a wasteful number, since it uses less digits than its factorization.

27728765252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932191317 (or 6932191315 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 53.

The spelling of 27728765252 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred sixty-five thousand, two hundred fifty-two".