27828623 has 4 divisors (see below), whose sum is σ = 28075008. Its totient is φ = 27582240.

The previous prime is 27828617. The next prime is 27828679. The reversal of 27828623 is 32682872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27828623 is a prime.

It is a super-2 number, since 2×27828623² = 1548864516152258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27828923) 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, 123023 + ... + 123248.

It is an arithmetic number, because the mean of its divisors is an integer number (7018752).

Almost surely, 2^27828623 is an apocalyptic number.

27828623 is a deficient number, since it is larger than the sum of its proper divisors (246385).

27828623 is a wasteful number, since it uses less digits than its factorization.

27828623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246384.

The product of its digits is 64512, while the sum is 38.

The square root of 27828623 is about 5275.2841629622. The cubic root of 27828623 is about 303.0381033094.

The spelling of 27828623 in words is "twenty-seven million, eight hundred twenty-eight thousand, six hundred twenty-three".