728079973 has 8 divisors (see below), whose sum is σ = 762566400. Its totient is φ = 693829488.

The previous prime is 728079971. The next prime is 728079977. The reversal of 728079973 is 379970827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728079973 - 2¹ = 728079971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728079973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728079971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52653 + ... + 65026.

It is an arithmetic number, because the mean of its divisors is an integer number (95320800).

Almost surely, 2^728079973 is an apocalyptic number.

It is an amenable number.

728079973 is a deficient number, since it is larger than the sum of its proper divisors (34486427).

728079973 is a wasteful number, since it uses less digits than its factorization.

728079973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117971.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The square root of 728079973 is about 26982.9570840559. The cubic root of 728079973 is about 899.6212286796.

The spelling of 728079973 in words is "seven hundred twenty-eight million, seventy-nine thousand, nine hundred seventy-three".