728272028 has 24 divisors (see below), whose sum is σ = 1392854400. Its totient is φ = 330433520.

The previous prime is 728272009. The next prime is 728272031. The reversal of 728272028 is 820272827.

It is a junction number, because it is equal to n+sod(n) for n = 728271982 and 728272000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10073 + ... + 39471.

It is an arithmetic number, because the mean of its divisors is an integer number (58035600).

Almost surely, 2^728272028 is an apocalyptic number.

It is an amenable number.

728272028 is a deficient number, since it is larger than the sum of its proper divisors (664582372).

728272028 is a wasteful number, since it uses less digits than its factorization.

728272028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29977 (or 29975 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 728272028 is about 26986.5156698674. The cubic root of 728272028 is about 899.7003232717.

The spelling of 728272028 in words is "seven hundred twenty-eight million, two hundred seventy-two thousand, twenty-eight".