27897649 has 8 divisors (see below), whose sum is σ = 30683520. Its totient is φ = 25203216.

The previous prime is 27897647. The next prime is 27897659. The reversal of 27897649 is 94679872.

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 27897649 - 2¹ = 27897647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27897596 and 27897605.

It is not an unprimeable number, because it can be changed into a prime (27897647) 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, 22219 + ... + 23440.

It is an arithmetic number, because the mean of its divisors is an integer number (3835440).

Almost surely, 2^27897649 is an apocalyptic number.

It is an amenable number.

27897649 is a deficient number, since it is larger than the sum of its proper divisors (2785871).

27897649 is a wasteful number, since it uses less digits than its factorization.

27897649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45719.

The product of its digits is 1524096, while the sum is 52.

The square root of 27897649 is about 5281.8225074306. The cubic root of 27897649 is about 303.2884479198.

It can be divided in two parts, 27897 and 649, that multiplied together give a triangular number (18105153 = T₆₀₁₇).

The spelling of 27897649 in words is "twenty-seven million, eight hundred ninety-seven thousand, six hundred forty-nine".