27826145 has 4 divisors (see below), whose sum is σ = 33391380. Its totient is φ = 22260912.

The previous prime is 27826133. The next prime is 27826147. The reversal of 27826145 is 54162872.

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 12271009 + 15555136 = 3503^2 + 3944^2 .

It is a cyclic number.

It is not a de Polignac number, because 27826145 - 2¹⁰ = 27825121 is a prime.

It is a super-2 number, since 2×27826145² = 1548588691122050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27826147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782610 + ... + 2782619.

It is an arithmetic number, because the mean of its divisors is an integer number (8347845).

Almost surely, 2^27826145 is an apocalyptic number.

It is an amenable number.

27826145 is a deficient number, since it is larger than the sum of its proper divisors (5565235).

27826145 is an equidigital number, since it uses as much as digits as its factorization.

27826145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565234.

The product of its digits is 26880, while the sum is 35.

The square root of 27826145 is about 5275.0492888693. The cubic root of 27826145 is about 303.0291083655.

The spelling of 27826145 in words is "twenty-seven million, eight hundred twenty-six thousand, one hundred forty-five".