3545728 has 16 divisors (see below), whose sum is σ = 7064010. Its totient is φ = 1772800.

The previous prime is 3545719. The next prime is 3545767. The reversal of 3545728 is 8275453.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3125824 + 419904 = 1768^2 + 648^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3545693 and 3545702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13723 + ... + 13978.

Almost surely, 2^3545728 is an apocalyptic number.

It is an amenable number.

3545728 is a deficient number, since it is larger than the sum of its proper divisors (3518282).

3545728 is an equidigital number, since it uses as much as digits as its factorization.

3545728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27715 (or 27703 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 3545728 is about 1883.0103557867. The cubic root of 3545728 is about 152.4878141298.

The spelling of 3545728 in words is "three million, five hundred forty-five thousand, seven hundred twenty-eight".