27977089 has 6 divisors (see below), whose sum is σ = 32544834. Its totient is φ = 23980320.

The previous prime is 27977077. The next prime is 27977093. The reversal of 27977089 is 98077972.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 6890625 = 4592^2 + 2625^2 .

It is not a de Polignac number, because 27977089 - 2¹¹ = 27975041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 570961 = 27977089 / (2 + 7 + 9 + 7 + 7 + 0 + 8 + 9).

It is not an unprimeable number, because it can be changed into a prime (27977029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285432 + ... + 285529.

It is an arithmetic number, because the mean of its divisors is an integer number (5424139).

Almost surely, 2^27977089 is an apocalyptic number.

It is an amenable number.

27977089 is a deficient number, since it is larger than the sum of its proper divisors (4567745).

27977089 is an equidigital number, since it uses as much as digits as its factorization.

27977089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570975 (or 570968 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 27977089 is about 5289.3372930831. The cubic root of 27977089 is about 303.5760516231.

The spelling of 27977089 in words is "twenty-seven million, nine hundred seventy-seven thousand, eighty-nine".