3720556 has 24 divisors (see below), whose sum is σ = 7529760. Its totient is φ = 1575552.

The previous prime is 3720553. The next prime is 3720571. The reversal of 3720556 is 6550273.

3720556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (3720551) 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, 1746 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (313740).

Almost surely, 2^3720556 is an apocalyptic number.

It is an amenable number.

3720556 is an abundant number, since it is smaller than the sum of its proper divisors (3809204).

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

3720556 is a wasteful number, since it uses less digits than its factorization.

3720556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 3720556 is about 1928.8742830988. The cubic root of 3720556 is about 154.9539370581.

The spelling of 3720556 in words is "three million, seven hundred twenty thousand, five hundred fifty-six".