27996280 has 64 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 9725952.

The previous prime is 27996259. The next prime is 27996299. The reversal of 27996280 is 8269972.

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 15 ways as a sum of consecutive naturals, for example, 7257 + ... + 10423.

It is an arithmetic number, because the mean of its divisors is an integer number (1122660).

Almost surely, 2^27996280 is an apocalyptic number.

27996280 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 27996280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35925120).

27996280 is an abundant number, since it is smaller than the sum of its proper divisors (43853960).

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

27996280 is a wasteful number, since it uses less digits than its factorization.

27996280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208 (or 3204 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 27996280 is about 5291.1511034935. The cubic root of 27996280 is about 303.6454488408.

The spelling of 27996280 in words is "twenty-seven million, nine hundred ninety-six thousand, two hundred eighty".