27779485 has 4 divisors (see below), whose sum is σ = 33335388. Its totient is φ = 22223584.

The previous prime is 27779483. The next prime is 27779497. The reversal of 27779485 is 58497772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4072324 + 23707161 = 2018^2 + 4869^2 .

It is a cyclic number.

It is not a de Polignac number, because 27779485 - 2¹ = 27779483 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27779483) 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, 2777944 + ... + 2777953.

It is an arithmetic number, because the mean of its divisors is an integer number (8333847).

Almost surely, 2^27779485 is an apocalyptic number.

It is an amenable number.

27779485 is a deficient number, since it is larger than the sum of its proper divisors (5555903).

27779485 is an equidigital number, since it uses as much as digits as its factorization.

27779485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555902.

The product of its digits is 987840, while the sum is 49.

The square root of 27779485 is about 5270.6247257797. The cubic root of 27779485 is about 302.8596364689.

The spelling of 27779485 in words is "twenty-seven million, seven hundred seventy-nine thousand, four hundred eighty-five".