673435728 has 160 divisors (see below), whose sum is σ = 2260966400. Its totient is φ = 187899264.

The previous prime is 673435717. The next prime is 673435757. The reversal of 673435728 is 827534376.

673435728 is a `hidden beast` number, since 6 + 73 + 4 + 3 + 572 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127443 + ... + 132621.

It is an arithmetic number, because the mean of its divisors is an integer number (14131040).

Almost surely, 2^673435728 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 673435728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130483200).

673435728 is an abundant number, since it is smaller than the sum of its proper divisors (1587530672).

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

673435728 is a wasteful number, since it uses less digits than its factorization.

673435728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246 (or 5234 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 673435728 is about 25950.6402233163. The cubic root of 673435728 is about 876.5271737715.

The spelling of 673435728 in words is "six hundred seventy-three million, four hundred thirty-five thousand, seven hundred twenty-eight".