3620728 has 32 divisors (see below), whose sum is σ = 7300800. Its totient is φ = 1677312.

The previous prime is 3620723. The next prime is 3620741. The reversal of 3620728 is 8270263.

It is a junction number, because it is equal to n+sod(n) for n = 3620696 and 3620705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3620723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10576 + ... + 10912.

It is an arithmetic number, because the mean of its divisors is an integer number (228150).

Almost surely, 2^3620728 is an apocalyptic number.

It is an amenable number.

3620728 is an abundant number, since it is smaller than the sum of its proper divisors (3680072).

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

3620728 is a wasteful number, since it uses less digits than its factorization.

3620728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 3620728 is about 1902.8210635790. The cubic root of 3620728 is about 153.5554730236. Note that the first 3 decimals are identical.

The spelling of 3620728 in words is "three million, six hundred twenty thousand, seven hundred twenty-eight".