27997320976 has 45 divisors (see below), whose sum is σ = 55257733461. Its totient is φ = 13741985472.

The previous prime is 27997320973. The next prime is 27997320977. The reversal of 27997320976 is 67902379972.

The square root of 27997320976 is 167324.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3736143376 + 24261177600 = 61124^2 + 155760^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27997320973) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39488110 + ... + 39488818.

Almost surely, 2^27997320976 is an apocalyptic number.

27997320976 is the 167324-th square number.

It is an amenable number.

27997320976 is a deficient number, since it is larger than the sum of its proper divisors (27260412485).

27997320976 is an frugal number, since it uses more digits than its factorization.

27997320976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 18003384, while the sum is 61.

The spelling of 27997320976 in words is "twenty-seven billion, nine hundred ninety-seven million, three hundred twenty thousand, nine hundred seventy-six".