5821816 has 64 divisors (see below), whose sum is σ = 14676480. Its totient is φ = 2090880.

The previous prime is 5821793. The next prime is 5821817. The reversal of 5821816 is 6181285.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7645 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^5821816 is an apocalyptic number.

5821816 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 5821816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7338240).

5821816 is an abundant number, since it is smaller than the sum of its proper divisors (8854664).

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

5821816 is a wasteful number, since it uses less digits than its factorization.

5821816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 760 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 5821816 is about 2412.8439651167. The cubic root of 5821816 is about 179.8951652920.

The spelling of 5821816 in words is "five million, eight hundred twenty-one thousand, eight hundred sixteen".