728673007 has 4 divisors (see below), whose sum is σ = 744176736. Its totient is φ = 713169280.

The previous prime is 728672983. The next prime is 728673017. The reversal of 728673007 is 700376827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728673007 - 2¹¹ = 728670959 is a prime.

It is a super-2 number, since 2×728673007² = 1061928702260844098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728673017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7751794 + ... + 7751887.

It is an arithmetic number, because the mean of its divisors is an integer number (186044184).

Almost surely, 2^728673007 is an apocalyptic number.

728673007 is a deficient number, since it is larger than the sum of its proper divisors (15503729).

728673007 is a wasteful number, since it uses less digits than its factorization.

728673007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503728.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 728673007 is about 26993.9438948813. The cubic root of 728673007 is about 899.8654148547.

The spelling of 728673007 in words is "seven hundred twenty-eight million, six hundred seventy-three thousand, seven".