728978124 has 24 divisors (see below), whose sum is σ = 1943941888. Its totient is φ = 208279440.

The previous prime is 728978119. The next prime is 728978137. The reversal of 728978124 is 421879827.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 4339072 + ... + 4339239.

Almost surely, 2^728978124 is an apocalyptic number.

It is an amenable number.

728978124 is an abundant number, since it is smaller than the sum of its proper divisors (1214963764).

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

728978124 is a wasteful number, since it uses less digits than its factorization.

728978124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678325 (or 8678323 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The square root of 728978124 is about 26999.5948858497. The cubic root of 728978124 is about 899.9909974408.

The spelling of 728978124 in words is "seven hundred twenty-eight million, nine hundred seventy-eight thousand, one hundred twenty-four".