27973257 has 16 divisors (see below), whose sum is σ = 40850880. Its totient is φ = 16921152.

The previous prime is 27973247. The next prime is 27973259. The reversal of 27973257 is 75237972.

It is not a de Polignac number, because 27973257 - 2¹⁵ = 27940489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27973259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3778 + ... + 8379.

It is an arithmetic number, because the mean of its divisors is an integer number (2553180).

Almost surely, 2^27973257 is an apocalyptic number.

It is an amenable number.

27973257 is a deficient number, since it is larger than the sum of its proper divisors (12877623).

27973257 is a wasteful number, since it uses less digits than its factorization.

27973257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12232.

The product of its digits is 185220, while the sum is 42.

The square root of 27973257 is about 5288.9750424822. The cubic root of 27973257 is about 303.5621907988.

It can be divided in two parts, 279 and 73257, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 27973257 in words is "twenty-seven million, nine hundred seventy-three thousand, two hundred fifty-seven".