5681816 has 32 divisors (see below), whose sum is σ = 12254880. Its totient is φ = 2419200.

The previous prime is 5681803. The next prime is 5681861. The reversal of 5681816 is 6181865.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13286 + ... + 13706.

It is an arithmetic number, because the mean of its divisors is an integer number (382965).

Almost surely, 2^5681816 is an apocalyptic number.

5681816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

5681816 is an abundant number, since it is smaller than the sum of its proper divisors (6573064).

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

5681816 is a wasteful number, since it uses less digits than its factorization.

5681816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 671 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 5681816 is about 2383.6560154519. The cubic root of 5681816 is about 178.4414410354.

The spelling of 5681816 in words is "five million, six hundred eighty-one thousand, eight hundred sixteen".