3640556 has 6 divisors (see below), whose sum is σ = 6370980. Its totient is φ = 1820276.

The previous prime is 3640543. The next prime is 3640561. The reversal of 3640556 is 6550463.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455066 + ... + 455073.

It is an arithmetic number, because the mean of its divisors is an integer number (1061830).

Almost surely, 2^3640556 is an apocalyptic number.

It is an amenable number.

3640556 is a deficient number, since it is larger than the sum of its proper divisors (2730424).

3640556 is a wasteful number, since it uses less digits than its factorization.

3640556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910143 (or 910141 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 3640556 is about 1908.0241088624. The cubic root of 3640556 is about 153.8352654602.

The spelling of 3640556 in words is "three million, six hundred forty thousand, five hundred fifty-six".