27628765 has 4 divisors (see below), whose sum is σ = 33154524. Its totient is φ = 22103008.

The previous prime is 27628759. The next prime is 27628771. The reversal of 27628765 is 56782672.

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

It is an interprime number because it is at equal distance from previous prime (27628759) and next prime (27628771).

It can be written as a sum of positive squares in 2 ways, for example, as 5331481 + 22297284 = 2309^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 27628765 - 2⁷ = 27628637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2762872 + ... + 2762881.

It is an arithmetic number, because the mean of its divisors is an integer number (8288631).

Almost surely, 2^27628765 is an apocalyptic number.

It is an amenable number.

27628765 is a deficient number, since it is larger than the sum of its proper divisors (5525759).

27628765 is an equidigital number, since it uses as much as digits as its factorization.

27628765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525758.

The product of its digits is 282240, while the sum is 43.

The square root of 27628765 is about 5256.3071637795. The cubic root of 27628765 is about 302.3109124966.

The spelling of 27628765 in words is "twenty-seven million, six hundred twenty-eight thousand, seven hundred sixty-five".