3556240 has 20 divisors (see below), whose sum is σ = 8268444. Its totient is φ = 1422464.

The previous prime is 3556219. The next prime is 3556243. The reversal of 3556240 is 426553.

It can be written as a sum of positive squares in 2 ways, for example, as 944784 + 2611456 = 972^2 + 1616^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (3556243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22147 + ... + 22306.

Almost surely, 2^3556240 is an apocalyptic number.

It is an amenable number.

3556240 is an abundant number, since it is smaller than the sum of its proper divisors (4712204).

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

3556240 is a wasteful number, since it uses less digits than its factorization.

3556240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44466 (or 44460 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 3556240 is about 1885.7995651712. The cubic root of 3556240 is about 152.6383587117.

The spelling of 3556240 in words is "three million, five hundred fifty-six thousand, two hundred forty".