27869869 has 4 divisors (see below), whose sum is σ = 27954400. Its totient is φ = 27785340.

The previous prime is 27869819. The next prime is 27869887. The reversal of 27869869 is 96896872.

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 27869869 - 2¹¹ = 27867821 is a prime.

It is a super-2 number, since 2×27869869² = 1553459196154322, 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 (27869819) 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, 41769 + ... + 42430.

It is an arithmetic number, because the mean of its divisors is an integer number (6988600).

Almost surely, 2^27869869 is an apocalyptic number.

It is an amenable number.

27869869 is a deficient number, since it is larger than the sum of its proper divisors (84531).

27869869 is an equidigital number, since it uses as much as digits as its factorization.

27869869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84530.

The product of its digits is 2612736, while the sum is 55.

The square root of 27869869 is about 5279.1920783393. The cubic root of 27869869 is about 303.1877446761.

The spelling of 27869869 in words is "twenty-seven million, eight hundred sixty-nine thousand, eight hundred sixty-nine".