27980910 has 64 divisors (see below), whose sum is σ = 77045760. Its totient is φ = 7218720.

The previous prime is 27980837. The next prime is 27980987. The reversal of 27980910 is 1908972.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6699 + ... + 10041.

It is an arithmetic number, because the mean of its divisors is an integer number (1203840).

Almost surely, 2^27980910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27980910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38522880).

27980910 is an abundant number, since it is smaller than the sum of its proper divisors (49064850).

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

27980910 is a wasteful number, since it uses less digits than its factorization.

27980910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390 (or 3384 counting only the distinct ones).

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

The square root of 27980910 is about 5289.6984791196. The cubic root of 27980910 is about 303.5898713989.

The spelling of 27980910 in words is "twenty-seven million, nine hundred eighty thousand, nine hundred ten".