27143728 has 20 divisors (see below), whose sum is σ = 52753320. Its totient is φ = 13529984.

The previous prime is 27143671. The next prime is 27143729. The reversal of 27143728 is 82734172.

It is a junction number, because it is equal to n+sod(n) for n = 27143693 and 27143702.

It is not an unprimeable number, because it can be changed into a prime (27143729) 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, 3108 + ... + 7996.

It is an arithmetic number, because the mean of its divisors is an integer number (2637666).

Almost surely, 2^27143728 is an apocalyptic number.

It is an amenable number.

27143728 is a deficient number, since it is larger than the sum of its proper divisors (25609592).

27143728 is a wasteful number, since it uses less digits than its factorization.

27143728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244 (or 5238 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 27143728 is about 5209.9642993019. The cubic root of 27143728 is about 300.5313841399.

The spelling of 27143728 in words is "twenty-seven million, one hundred forty-three thousand, seven hundred twenty-eight".