27995890 has 16 divisors (see below), whose sum is σ = 54269208. Its totient is φ = 10336896.

The previous prime is 27995843. The next prime is 27995893. The reversal of 27995890 is 9859972.

It can be written as a sum of positive squares in 4 ways, for example, as 8450649 + 19545241 = 2907^2 + 4421^2 .

It is not an unprimeable number, because it can be changed into a prime (27995893) 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, 107547 + ... + 107806.

Almost surely, 2^27995890 is an apocalyptic number.

27995890 is a deficient number, since it is larger than the sum of its proper divisors (26273318).

27995890 is a wasteful number, since it uses less digits than its factorization.

27995890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215373.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 27995890 is about 5291.1142493807. The cubic root of 27995890 is about 303.6440388645.

It can be divided in two parts, 279 and 95890, that added together give a palindrome (96169).

The spelling of 27995890 in words is "twenty-seven million, nine hundred ninety-five thousand, eight hundred ninety".