7200728 has 8 divisors (see below), whose sum is σ = 13501380. Its totient is φ = 3600360.

The previous prime is 7200719. The next prime is 7200733. The reversal of 7200728 is 8270027.

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

It is a junction number, because it is equal to n+sod(n) for n = 7200697 and 7200706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450038 + ... + 450053.

Almost surely, 2^7200728 is an apocalyptic number.

It is an amenable number.

7200728 is a deficient number, since it is larger than the sum of its proper divisors (6300652).

7200728 is a wasteful number, since it uses less digits than its factorization.

7200728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900097 (or 900093 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 7200728 is about 2683.4172243615. The cubic root of 7200728 is about 193.1043848154.

The spelling of 7200728 in words is "seven million, two hundred thousand, seven hundred twenty-eight".