27955649 has 4 divisors (see below), whose sum is σ = 29171136. Its totient is φ = 26740164.

The previous prime is 27955643. The next prime is 27955693. The reversal of 27955649 is 94655972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27955649 - 2⁸ = 27955393 is a prime.

It is a super-2 number, since 2×27955649² = 1563036622022402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27955643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607709 + ... + 607754.

It is an arithmetic number, because the mean of its divisors is an integer number (7292784).

Almost surely, 2^27955649 is an apocalyptic number.

It is an amenable number.

27955649 is a deficient number, since it is larger than the sum of its proper divisors (1215487).

27955649 is a wasteful number, since it uses less digits than its factorization.

27955649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215486.

The product of its digits is 680400, while the sum is 47.

The square root of 27955649 is about 5287.3101857183. The cubic root of 27955649 is about 303.4984841788.

The spelling of 27955649 in words is "twenty-seven million, nine hundred fifty-five thousand, six hundred forty-nine".