27981465 has 8 divisors (see below), whose sum is σ = 44770368. Its totient is φ = 14923440.

The previous prime is 27981461. The next prime is 27981467. The reversal of 27981465 is 56418972.

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

It is not a de Polignac number, because 27981465 - 2² = 27981461 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 932701 + ... + 932730.

It is an arithmetic number, because the mean of its divisors is an integer number (5596296).

Almost surely, 2^27981465 is an apocalyptic number.

It is an amenable number.

27981465 is a deficient number, since it is larger than the sum of its proper divisors (16788903).

27981465 is a wasteful number, since it uses less digits than its factorization.

27981465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865439.

The product of its digits is 120960, while the sum is 42.

The square root of 27981465 is about 5289.7509393165. The cubic root of 27981465 is about 303.5918786158.

The spelling of 27981465 in words is "twenty-seven million, nine hundred eighty-one thousand, four hundred sixty-five".