27949880 has 64 divisors (see below), whose sum is σ = 72411840. Its totient is φ = 9510912.

The previous prime is 27949877. The next prime is 27949891. The reversal of 27949880 is 8894972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48152 + ... + 48728.

It is an arithmetic number, because the mean of its divisors is an integer number (1131435).

Almost surely, 2^27949880 is an apocalyptic number.

27949880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27949880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36205920).

27949880 is an abundant number, since it is smaller than the sum of its proper divisors (44461960).

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

27949880 is a wasteful number, since it uses less digits than its factorization.

27949880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 27949880 is about 5286.7646060705. The cubic root of 27949880 is about 303.4776058320.

The spelling of 27949880 in words is "twenty-seven million, nine hundred forty-nine thousand, eight hundred eighty".