27216432 has 60 divisors (see below), whose sum is σ = 78433720. Its totient is φ = 9036000.

The previous prime is 27216403. The next prime is 27216433. The reversal of 27216432 is 23461272.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 27216396 and 27216405.

It is not an unprimeable number, because it can be changed into a prime (27216433) 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, 108307 + ... + 108557.

Almost surely, 2^27216432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27216432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39216860).

27216432 is an abundant number, since it is smaller than the sum of its proper divisors (51217288).

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

27216432 is an equidigital number, since it uses as much as digits as its factorization.

27216432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 256 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 27216432 is about 5216.9370323975. The cubic root of 27216432 is about 300.7994676126.

Multiplying 27216432 by its sum of digits (27), we get a square (734843664 = 27108²).

27216432 divided by its sum of digits (27) gives a square (1008016 = 1004²).

The spelling of 27216432 in words is "twenty-seven million, two hundred sixteen thousand, four hundred thirty-two".