27009990 has 128 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 5961600.

The previous prime is 27009989. The next prime is 27010003. The reversal of 27009990 is 9990072.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58360 + ... + 58820.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^27009990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27009990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42577920).

27009990 is an abundant number, since it is smaller than the sum of its proper divisors (58145850).

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

27009990 is a wasteful number, since it uses less digits than its factorization.

27009990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 27009990 is about 5197.1136220021. The cubic root of 27009990 is about 300.0369954376.

The spelling of 27009990 in words is "twenty-seven million, nine thousand, nine hundred ninety".