3811728 has 20 divisors (see below), whose sum is σ = 9847088. Its totient is φ = 1270560.

The previous prime is 3811711. The next prime is 3811733. The reversal of 3811728 is 8271183.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3811695 and 3811704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39658 + ... + 39753.

Almost surely, 2^3811728 is an apocalyptic number.

It is an amenable number.

3811728 is an abundant number, since it is smaller than the sum of its proper divisors (6035360).

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

3811728 is a wasteful number, since it uses less digits than its factorization.

3811728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79422 (or 79416 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 3811728 is about 1952.3647200254. The cubic root of 3811728 is about 156.2094491036.

The spelling of 3811728 in words is "three million, eight hundred eleven thousand, seven hundred twenty-eight".