27728778344 has 8 divisors (see below), whose sum is σ = 51991459410. Its totient is φ = 13864389168.

The previous prime is 27728778313. The next prime is 27728778401. The reversal of 27728778344 is 44387782772.

It can be written as a sum of positive squares in only one way, i.e., 27698944900 + 29833444 = 166430^2 + 5462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1733048639 + ... + 1733048654.

Almost surely, 2^27728778344 is an apocalyptic number.

It is an amenable number.

27728778344 is a deficient number, since it is larger than the sum of its proper divisors (24262681066).

27728778344 is a wasteful number, since it uses less digits than its factorization.

27728778344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466097299 (or 3466097295 counting only the distinct ones).

The product of its digits is 29503488, while the sum is 59.

The spelling of 27728778344 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred seventy-eight thousand, three hundred forty-four".