5781216 has 72 divisors (see below), whose sum is σ = 17667720. Its totient is φ = 1650432.

The previous prime is 5781169. The next prime is 5781239. The reversal of 5781216 is 6121875.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4090 + ... + 5318.

It is an arithmetic number, because the mean of its divisors is an integer number (245385).

Almost surely, 2^5781216 is an apocalyptic number.

5781216 is a gapful number since it is divisible by the number (56) 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 5781216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8833860).

5781216 is an abundant number, since it is smaller than the sum of its proper divisors (11886504).

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

5781216 is a wasteful number, since it uses less digits than its factorization.

5781216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1241 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 5781216 is about 2404.4159373952. The cubic root of 5781216 is about 179.4760069627.

The spelling of 5781216 in words is "five million, seven hundred eighty-one thousand, two hundred sixteen".