5681810 has 16 divisors (see below), whose sum is σ = 10276416. Its totient is φ = 2261808.

The previous prime is 5681803. The next prime is 5681861. The reversal of 5681810 is 181865.

5681810 = 31² + 32² + ... + 257².

It is a super-2 number, since 2×5681810² = 64565929752200, which contains 22 as substring.

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, 1019 + ... + 3521.

It is an arithmetic number, because the mean of its divisors is an integer number (642276).

Almost surely, 2^5681810 is an apocalyptic number.

5681810 is a deficient number, since it is larger than the sum of its proper divisors (4594606).

5681810 is a wasteful number, since it uses less digits than its factorization.

5681810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 5681810 is about 2383.6547568807. The cubic root of 5681810 is about 178.4413782240.

Subtracting from 5681810 its reverse (181865), we obtain a palindrome (5499945).

The spelling of 5681810 in words is "five million, six hundred eighty-one thousand, eight hundred ten".