27216828 has 18 divisors (see below), whose sum is σ = 68798184. Its totient is φ = 9072264.

The previous prime is 27216799. The next prime is 27216829. The reversal of 27216828 is 82861272.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 756023 = 27216828 / (2 + 7 + 2 + 1 + 6 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 27216792 and 27216801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27216829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377976 + ... + 378047.

Almost surely, 2^27216828 is an apocalyptic number.

It is an amenable number.

27216828 is an abundant number, since it is smaller than the sum of its proper divisors (41581356).

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

27216828 is a wasteful number, since it uses less digits than its factorization.

27216828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756033 (or 756028 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 27216828 is about 5216.9749855640. The cubic root of 27216828 is about 300.8009264863.

The spelling of 27216828 in words is "twenty-seven million, two hundred sixteen thousand, eight hundred twenty-eight".