27138669 has 16 divisors (see below), whose sum is σ = 38330880. Its totient is φ = 17031600.

The previous prime is 27138667. The next prime is 27138691. The reversal of 27138669 is 96683172.

It is a happy number.

It is not a de Polignac number, because 27138669 - 2¹ = 27138667 is a prime.

It is a super-2 number, since 2×27138669² = 1473014710183122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27138669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27138667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8094 + ... + 10944.

It is an arithmetic number, because the mean of its divisors is an integer number (2395680).

Almost surely, 2^27138669 is an apocalyptic number.

It is an amenable number.

27138669 is a deficient number, since it is larger than the sum of its proper divisors (11192211).

27138669 is a wasteful number, since it uses less digits than its factorization.

27138669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040.

The product of its digits is 108864, while the sum is 42.

The square root of 27138669 is about 5209.4787647134. The cubic root of 27138669 is about 300.5127121439.

The spelling of 27138669 in words is "twenty-seven million, one hundred thirty-eight thousand, six hundred sixty-nine".