27980489 has 4 divisors (see below), whose sum is σ = 29197056. Its totient is φ = 26763924.

The previous prime is 27980471. The next prime is 27980497. The reversal of 27980489 is 98408972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27980489 - 2⁸ = 27980233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27980789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608249 + ... + 608294.

It is an arithmetic number, because the mean of its divisors is an integer number (7299264).

Almost surely, 2^27980489 is an apocalyptic number.

It is an amenable number.

27980489 is a deficient number, since it is larger than the sum of its proper divisors (1216567).

27980489 is a wasteful number, since it uses less digits than its factorization.

27980489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216566.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 27980489 is about 5289.6586846412. The cubic root of 27980489 is about 303.5883487896.

The spelling of 27980489 in words is "twenty-seven million, nine hundred eighty thousand, four hundred eighty-nine".