27689421 has 8 divisors (see below), whose sum is σ = 37386880. Its totient is φ = 18225792.

The previous prime is 27689419. The next prime is 27689423. The reversal of 27689421 is 12498672.

It is an interprime number because it is at equal distance from previous prime (27689419) and next prime (27689423).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27689421 - 2¹ = 27689419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27689421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27689423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58180 + ... + 58653.

It is an arithmetic number, because the mean of its divisors is an integer number (4673360).

Almost surely, 2^27689421 is an apocalyptic number.

It is an amenable number.

27689421 is a deficient number, since it is larger than the sum of its proper divisors (9697459).

27689421 is a wasteful number, since it uses less digits than its factorization.

27689421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116915.

The product of its digits is 48384, while the sum is 39.

The square root of 27689421 is about 5262.0738307249. The cubic root of 27689421 is about 302.5319812282.

The spelling of 27689421 in words is "twenty-seven million, six hundred eighty-nine thousand, four hundred twenty-one".