3820728 has 32 divisors (see below), whose sum is σ = 9599760. Its totient is φ = 1267200.

The previous prime is 3820727. The next prime is 3820759. The reversal of 3820728 is 8270283.

3820728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3820695 and 3820704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820727) 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, 9328 + ... + 9728.

Almost surely, 2^3820728 is an apocalyptic number.

It is an amenable number.

3820728 is an abundant number, since it is smaller than the sum of its proper divisors (5779032).

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

3820728 is a wasteful number, since it uses less digits than its factorization.

3820728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 3820728 is about 1954.6682582986. The cubic root of 3820728 is about 156.3322962739.

The spelling of 3820728 in words is "three million, eight hundred twenty thousand, seven hundred twenty-eight".