27899955 has 12 divisors (see below), whose sum is σ = 48360000. Its totient is φ = 14879952.

The previous prime is 27899951. The next prime is 27899957. The reversal of 27899955 is 55999872.

It is not a de Polignac number, because 27899955 - 2² = 27899951 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27899951) 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 11 ways as a sum of consecutive naturals, for example, 309955 + ... + 310044.

It is an arithmetic number, because the mean of its divisors is an integer number (4030000).

Almost surely, 2^27899955 is an apocalyptic number.

27899955 is a deficient number, since it is larger than the sum of its proper divisors (20460045).

27899955 is a wasteful number, since it uses less digits than its factorization.

27899955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620010 (or 620007 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 27899955 is about 5282.0407987822. The cubic root of 27899955 is about 303.2968042260.

The spelling of 27899955 in words is "twenty-seven million, eight hundred ninety-nine thousand, nine hundred fifty-five".