27981468 has 36 divisors (see below), whose sum is σ = 73015488. Its totient is φ = 9025920.

The previous prime is 27981467. The next prime is 27981487. The reversal of 27981468 is 86418972.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27981461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11421 + ... + 13652.

It is an arithmetic number, because the mean of its divisors is an integer number (2028208).

Almost surely, 2^27981468 is an apocalyptic number.

It is an amenable number.

27981468 is an abundant number, since it is smaller than the sum of its proper divisors (45034020).

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

27981468 is a wasteful number, since it uses less digits than its factorization.

27981468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25114 (or 25109 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 27981468 is about 5289.7512228837. The cubic root of 27981468 is about 303.5918894655.

The spelling of 27981468 in words is "twenty-seven million, nine hundred eighty-one thousand, four hundred sixty-eight".