27897545 has 16 divisors (see below), whose sum is σ = 36493632. Its totient is φ = 20349120.

The previous prime is 27897511. The next prime is 27897559. The reversal of 27897545 is 54579872.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-27897545 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27897545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2810 + ... + 7980.

It is an arithmetic number, because the mean of its divisors is an integer number (2280852).

Almost surely, 2^27897545 is an apocalyptic number.

It is an amenable number.

27897545 is a deficient number, since it is larger than the sum of its proper divisors (8596087).

27897545 is a wasteful number, since it uses less digits than its factorization.

27897545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272.

The product of its digits is 705600, while the sum is 47.

The square root of 27897545 is about 5281.8126623348. The cubic root of 27897545 is about 303.2880710417.

The spelling of 27897545 in words is "twenty-seven million, eight hundred ninety-seven thousand, five hundred forty-five".