3728724 has 12 divisors (see below), whose sum is σ = 8700384. Its totient is φ = 1242904.

The previous prime is 3728719. The next prime is 3728743. The reversal of 3728724 is 4278273.

3728724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 155352 + ... + 155375.

It is an arithmetic number, because the mean of its divisors is an integer number (725032).

Almost surely, 2^3728724 is an apocalyptic number.

It is an amenable number.

3728724 is an abundant number, since it is smaller than the sum of its proper divisors (4971660).

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

3728724 is a wasteful number, since it uses less digits than its factorization.

3728724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310734 (or 310732 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 3728724 is about 1930.9904194480. The cubic root of 3728724 is about 155.0672479616.

The spelling of 3728724 in words is "three million, seven hundred twenty-eight thousand, seven hundred twenty-four".