27147920 has 40 divisors (see below), whose sum is σ = 63605304. Its totient is φ = 10775552.

The previous prime is 27147919. The next prime is 27147947. The reversal of 27147920 is 2974172.

It can be written as a sum of positive squares in 4 ways, for example, as 3489424 + 23658496 = 1868^2 + 4864^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9722 + ... + 12198.

Almost surely, 2^27147920 is an apocalyptic number.

27147920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27147920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31802652).

27147920 is an abundant number, since it is smaller than the sum of its proper divisors (36457384).

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

27147920 is a wasteful number, since it uses less digits than its factorization.

27147920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627 (or 2621 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 27147920 is about 5210.3665897900. The cubic root of 27147920 is about 300.5468544137.

The spelling of 27147920 in words is "twenty-seven million, one hundred forty-seven thousand, nine hundred twenty".