3556644 has 48 divisors (see below), whose sum is σ = 10217088. Its totient is φ = 937728.

The previous prime is 3556607. The next prime is 3556649. The reversal of 3556644 is 4466553.

It is a hoax number, since the sum of its digits (33) 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 (3556649) 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, 537 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (212856).

Almost surely, 2^3556644 is an apocalyptic number.

It is an amenable number.

3556644 is an abundant number, since it is smaller than the sum of its proper divisors (6660444).

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

3556644 is a wasteful number, since it uses less digits than its factorization.

3556644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284 (or 3282 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 3556644 is about 1885.9066784971. The cubic root of 3556644 is about 152.6441385580.

Subtracting 3556644 from its reverse (4466553), we obtain a palindrome (909909).

The spelling of 3556644 in words is "three million, five hundred fifty-six thousand, six hundred forty-four".