27970649 has 16 divisors (see below), whose sum is σ = 33248256. Its totient is φ = 23025600.

The previous prime is 27970643. The next prime is 27970669. The reversal of 27970649 is 94607972.

It is a cyclic number.

It is not a de Polignac number, because 27970649 - 2⁴ = 27970633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27970643) 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, 33659 + ... + 34479.

It is an arithmetic number, because the mean of its divisors is an integer number (2078016).

Almost surely, 2^27970649 is an apocalyptic number.

It is an amenable number.

27970649 is a deficient number, since it is larger than the sum of its proper divisors (5277607).

27970649 is a wasteful number, since it uses less digits than its factorization.

27970649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 27970649 is about 5288.7284861297. The cubic root of 27970649 is about 303.5527566120.

The spelling of 27970649 in words is "twenty-seven million, nine hundred seventy thousand, six hundred forty-nine".