27981948 has 12 divisors (see below), whose sum is σ = 65291240. Its totient is φ = 9327312.

The previous prime is 27981931. The next prime is 27981971. The reversal of 27981948 is 84918972.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 27981897 and 27981906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165903 + ... + 1165926.

Almost surely, 2^27981948 is an apocalyptic number.

It is an amenable number.

27981948 is an abundant number, since it is smaller than the sum of its proper divisors (37309292).

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

27981948 is a wasteful number, since it uses less digits than its factorization.

27981948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331836 (or 2331834 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 27981948 is about 5289.7965934429. The cubic root of 27981948 is about 303.5936254153.

The spelling of 27981948 in words is "twenty-seven million, nine hundred eighty-one thousand, nine hundred forty-eight".