27397887 has 16 divisors (see below), whose sum is σ = 39941760. Its totient is φ = 16567200.

The previous prime is 27397883. The next prime is 27397891. The reversal of 27397887 is 78879372.

It is an interprime number because it is at equal distance from previous prime (27397883) and next prime (27397891).

It is not a de Polignac number, because 27397887 - 2² = 27397883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27397883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22812 + ... + 23982.

It is an arithmetic number, because the mean of its divisors is an integer number (2496360).

Almost surely, 2^27397887 is an apocalyptic number.

27397887 is a deficient number, since it is larger than the sum of its proper divisors (12543873).

27397887 is a wasteful number, since it uses less digits than its factorization.

27397887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894.

The product of its digits is 1185408, while the sum is 51.

The square root of 27397887 is about 5234.2990934795. The cubic root of 27397887 is about 301.4664753750.

The spelling of 27397887 in words is "twenty-seven million, three hundred ninety-seven thousand, eight hundred eighty-seven".