27981882 has 32 divisors (see below), whose sum is σ = 62530560. Its totient is φ = 9275040.

The previous prime is 27981853. The next prime is 27981901. The reversal of 27981882 is 28818972.

It is a happy 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, 8958 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (1954080).

Almost surely, 2^27981882 is an apocalyptic number.

27981882 is an abundant number, since it is smaller than the sum of its proper divisors (34548678).

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

27981882 is a wasteful number, since it uses less digits than its factorization.

27981882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915 (or 2909 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 27981882 is about 5289.7903550141. The cubic root of 27981882 is about 303.5933867234.

The spelling of 27981882 in words is "twenty-seven million, nine hundred eighty-one thousand, eight hundred eighty-two".