27109890 has 40 divisors (see below), whose sum is σ = 72897660. Its totient is φ = 7229088.

The previous prime is 27109879. The next prime is 27109891. The reversal of 27109890 is 9890172.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26409321 + 700569 = 5139^2 + 837^2 .

It is a super-2 number, since 2×27109890² = 1469892271624200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27109891) 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 19 ways as a sum of consecutive naturals, for example, 15925 + ... + 17544.

Almost surely, 2^27109890 is an apocalyptic number.

27109890 is an abundant number, since it is smaller than the sum of its proper divisors (45787770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27109890 is a wasteful number, since it uses less digits than its factorization.

27109890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33488 (or 33479 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 27109890 is about 5206.7158555082. The cubic root of 27109890 is about 300.4064490818.

The spelling of 27109890 in words is "twenty-seven million, one hundred nine thousand, eight hundred ninety".