3555648 has 42 divisors (see below), whose sum is σ = 10193274. Its totient is φ = 1185024.

The previous prime is 3555647. The next prime is 3555649. The reversal of 3555648 is 8465553.

3555648 is a `hidden beast` number, since 3 + 5 + 5 + 5 + 648 = 666.

It is an interprime number because it is at equal distance from previous prime (3555647) and next prime (3555649).

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 1617984 = 1392^2 + 1272^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2511 + ... + 3662.

It is an arithmetic number, because the mean of its divisors is an integer number (242697).

Almost surely, 2^3555648 is an apocalyptic number.

It is an amenable number.

3555648 is an abundant number, since it is smaller than the sum of its proper divisors (6637626).

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

3555648 is a wasteful number, since it uses less digits than its factorization.

3555648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191 (or 6178 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 3555648 is about 1885.6425960399. The cubic root of 3555648 is about 152.6298884432.

The spelling of 3555648 in words is "three million, five hundred fifty-five thousand, six hundred forty-eight".