27216816 has 80 divisors (see below), whose sum is σ = 80768640. Its totient is φ = 7810560.

The previous prime is 27216799. The next prime is 27216829. The reversal of 27216816 is 61861272.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8676 + ... + 11388.

It is an arithmetic number, because the mean of its divisors is an integer number (1009608).

Almost surely, 2^27216816 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 27216816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40384320).

27216816 is an abundant number, since it is smaller than the sum of its proper divisors (53551824).

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

27216816 is a wasteful number, since it uses less digits than its factorization.

27216816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2748 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 27216816 is about 5216.9738354721. The cubic root of 27216816 is about 300.8008822782.

The spelling of 27216816 in words is "twenty-seven million, two hundred sixteen thousand, eight hundred sixteen".