3504728 has 8 divisors (see below), whose sum is σ = 6571380. Its totient is φ = 1752360.

The previous prime is 3504727. The next prime is 3504757. The reversal of 3504728 is 8274053.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 3504728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3504727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219038 + ... + 219053.

Almost surely, 2^3504728 is an apocalyptic number.

It is an amenable number.

3504728 is a deficient number, since it is larger than the sum of its proper divisors (3066652).

3504728 is a wasteful number, since it uses less digits than its factorization.

3504728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438097 (or 438093 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 3504728 is about 1872.0918780872. The cubic root of 3504728 is about 151.8977844641.

The spelling of 3504728 in words is "three million, five hundred four thousand, seven hundred twenty-eight".