27123728 has 10 divisors (see below), whose sum is σ = 52552254. Its totient is φ = 13561856.

The previous prime is 27123727. The next prime is 27123749. The reversal of 27123728 is 82732172.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 6801664 = 4508^2 + 2608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27123694 and 27123703.

It is not an unprimeable number, because it can be changed into a prime (27123727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847601 + ... + 847632.

Almost surely, 2^27123728 is an apocalyptic number.

It is an amenable number.

27123728 is a deficient number, since it is larger than the sum of its proper divisors (25428526).

27123728 is a wasteful number, since it uses less digits than its factorization.

27123728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695241 (or 1695235 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 27123728 is about 5208.0445466605. The cubic root of 27123728 is about 300.4575536459.

The spelling of 27123728 in words is "twenty-seven million, one hundred twenty-three thousand, seven hundred twenty-eight".