27689545 has 16 divisors (see below), whose sum is σ = 35924112. Its totient is φ = 20367360.

The previous prime is 27689537. The next prime is 27689573. The reversal of 27689545 is 54598672.

It can be written as a sum of positive squares in 8 ways, for example, as 14227984 + 13461561 = 3772^2 + 3669^2 .

It is not a de Polignac number, because 27689545 - 2³ = 27689537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27689495 and 27689504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19665 + ... + 21025.

It is an arithmetic number, because the mean of its divisors is an integer number (2245257).

Almost surely, 2^27689545 is an apocalyptic number.

It is an amenable number.

27689545 is a deficient number, since it is larger than the sum of its proper divisors (8234567).

27689545 is a wasteful number, since it uses less digits than its factorization.

27689545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

The product of its digits is 604800, while the sum is 46.

The square root of 27689545 is about 5262.0856131386. The cubic root of 27689545 is about 302.5324328316.

The spelling of 27689545 in words is "twenty-seven million, six hundred eighty-nine thousand, five hundred forty-five".