27999471 has 8 divisors (see below), whose sum is σ = 38620080. Its totient is φ = 18022592.

The previous prime is 27999467. The next prime is 27999481. The reversal of 27999471 is 17499972.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27999471 - 2² = 27999467 is a prime.

It is a super-3 number, since 3×27999471³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27999471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27999401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160830 + ... + 161003.

It is an arithmetic number, because the mean of its divisors is an integer number (4827510).

Almost surely, 2^27999471 is an apocalyptic number.

27999471 is a deficient number, since it is larger than the sum of its proper divisors (10620609).

27999471 is a wasteful number, since it uses less digits than its factorization.

27999471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321865.

The product of its digits is 285768, while the sum is 48.

The square root of 27999471 is about 5291.4526360915. The cubic root of 27999471 is about 303.6569848475.

The spelling of 27999471 in words is "twenty-seven million, nine hundred ninety-nine thousand, four hundred seventy-one".