27953649 has 6 divisors (see below), whose sum is σ = 40377506. Its totient is φ = 18635760.

The previous prime is 27953641. The next prime is 27953659. The reversal of 27953649 is 94635972.

It is a happy number.

27953649 is a `hidden beast` number, since 2 + 79 + 536 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24324624 + 3629025 = 4932^2 + 1905^2 .

It is not a de Polignac number, because 27953649 - 2³ = 27953641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27953641) 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 5 ways as a sum of consecutive naturals, for example, 1552972 + ... + 1552989.

Almost surely, 2^27953649 is an apocalyptic number.

It is an amenable number.

27953649 is a deficient number, since it is larger than the sum of its proper divisors (12423857).

27953649 is a wasteful number, since it uses less digits than its factorization.

27953649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105967 (or 3105964 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 27953649 is about 5287.1210502503. The cubic root of 27953649 is about 303.4912463877.

The spelling of 27953649 in words is "twenty-seven million, nine hundred fifty-three thousand, six hundred forty-nine".