3556806 has 16 divisors (see below), whose sum is σ = 7760448. Its totient is φ = 1077800.

The previous prime is 3556801. The next prime is 3556811. The reversal of 3556806 is 6086553.

3556806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3556801) and next prime (3556811).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3556801) by changing a digit.

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, 26880 + ... + 27011.

It is an arithmetic number, because the mean of its divisors is an integer number (485028).

Almost surely, 2^3556806 is an apocalyptic number.

3556806 is an abundant number, since it is smaller than the sum of its proper divisors (4203642).

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

3556806 is a wasteful number, since it uses less digits than its factorization.

3556806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53907.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 3556806 is about 1885.9496281714. The cubic root of 3556806 is about 152.6464560962.

The spelling of 3556806 in words is "three million, five hundred fifty-six thousand, eight hundred six".