723905028 has 108 divisors (see below), whose sum is σ = 2322199152. Its totient is φ = 188022240.

The previous prime is 723904991. The next prime is 723905029. The reversal of 723905028 is 820509327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 723904983 and 723905001.

It is not an unprimeable number, because it can be changed into a prime (723905029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 751 + ... + 38057.

It is an arithmetic number, because the mean of its divisors is an integer number (21501844).

Almost surely, 2^723905028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723905028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161099576).

723905028 is an abundant number, since it is smaller than the sum of its proper divisors (1598294124).

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

723905028 is a wasteful number, since it uses less digits than its factorization.

723905028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37342 (or 37330 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 723905028 is about 26905.4832329769. The cubic root of 723905028 is about 897.8984000543.

The spelling of 723905028 in words is "seven hundred twenty-three million, nine hundred five thousand, twenty-eight".