27480989 has 8 divisors (see below), whose sum is σ = 27892920. Its totient is φ = 27072000.

The previous prime is 27480983. The next prime is 27480997. The reversal of 27480989 is 98908472.

It can be written as a sum of positive squares in 4 ways, for example, as 8076964 + 19404025 = 2842^2 + 4405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27480989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27480983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23777 + ... + 24905.

It is an arithmetic number, because the mean of its divisors is an integer number (3486615).

Almost surely, 2^27480989 is an apocalyptic number.

It is an amenable number.

27480989 is a deficient number, since it is larger than the sum of its proper divisors (411931).

27480989 is a wasteful number, since it uses less digits than its factorization.

27480989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

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

The square root of 27480989 is about 5242.2312997425. The cubic root of 27480989 is about 301.7709657700.

The spelling of 27480989 in words is "twenty-seven million, four hundred eighty thousand, nine hundred eighty-nine".