27028391 has 8 divisors (see below), whose sum is σ = 29231664. Its totient is φ = 24842880.

The previous prime is 27028387. The next prime is 27028399. The reversal of 27028391 is 19382072.

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 27028391 - 2² = 27028387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27028399) 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, 1181 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (3653958).

Almost surely, 2^27028391 is an apocalyptic number.

27028391 is a deficient number, since it is larger than the sum of its proper divisors (2203273).

27028391 is a wasteful number, since it uses less digits than its factorization.

27028391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 27028391 is about 5198.8836301652. The cubic root of 27028391 is about 300.1051150170.

It can be divided in two parts, 270 and 28391, that multiplied together give a triangular number (7665570 = T₃₉₁₅).

The spelling of 27028391 in words is "twenty-seven million, twenty-eight thousand, three hundred ninety-one".