27995869 has 4 divisors (see below), whose sum is σ = 30540960. Its totient is φ = 25450780.

The previous prime is 27995843. The next prime is 27995893. The reversal of 27995869 is 96859972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27995869 - 2¹³ = 27987677 is a prime.

It is a super-2 number, since 2×27995869² = 1567537362130322, 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 (27995809) 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, 1272529 + ... + 1272550.

It is an arithmetic number, because the mean of its divisors is an integer number (7635240).

Almost surely, 2^27995869 is an apocalyptic number.

It is an amenable number.

27995869 is a deficient number, since it is larger than the sum of its proper divisors (2545091).

27995869 is a wasteful number, since it uses less digits than its factorization.

27995869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545090.

The product of its digits is 2449440, while the sum is 55.

The square root of 27995869 is about 5291.1122649212. The cubic root of 27995869 is about 303.6439629423.

It can be divided in two parts, 2799 and 5869, that added together give a palindrome (8668).

The spelling of 27995869 in words is "twenty-seven million, nine hundred ninety-five thousand, eight hundred sixty-nine".