27748880 has 40 divisors (see below), whose sum is σ = 65620800. Its totient is φ = 10909568.

The previous prime is 27748871. The next prime is 27748883. The reversal of 27748880 is 8884772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (27748883) 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 7 ways as a sum of consecutive naturals, for example, 1781 + ... + 7659.

It is an arithmetic number, because the mean of its divisors is an integer number (1640520).

Almost surely, 2^27748880 is an apocalyptic number.

27748880 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 27748880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32810400).

27748880 is an abundant number, since it is smaller than the sum of its proper divisors (37871920).

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

27748880 is a wasteful number, since it uses less digits than its factorization.

27748880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951 (or 5945 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 27748880 is about 5267.7205696582. The cubic root of 27748880 is about 302.7483742048.

The spelling of 27748880 in words is "twenty-seven million, seven hundred forty-eight thousand, eight hundred eighty".