27981474 has 8 divisors (see below), whose sum is σ = 55962960. Its totient is φ = 9327156.

The previous prime is 27981467. The next prime is 27981487. The reversal of 27981474 is 47418972.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

27981474 is an admirable 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, 2331784 + ... + 2331795.

It is an arithmetic number, because the mean of its divisors is an integer number (6995370).

Almost surely, 2^27981474 is an apocalyptic number.

27981474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27981474 is a wasteful number, since it uses less digits than its factorization.

27981474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663584.

The product of its digits is 112896, while the sum is 42.

The square root of 27981474 is about 5289.7517900181. The cubic root of 27981474 is about 303.5919111650.

The spelling of 27981474 in words is "twenty-seven million, nine hundred eighty-one thousand, four hundred seventy-four".