728212807 has 4 divisors (see below), whose sum is σ = 832243216. Its totient is φ = 624182400.

The previous prime is 728212747. The next prime is 728212811. The reversal of 728212807 is 708212827.

It is a happy number.

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 728212807 - 2¹⁵ = 728180039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728212007) 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 3 ways as a sum of consecutive naturals, for example, 52015194 + ... + 52015207.

It is an arithmetic number, because the mean of its divisors is an integer number (208060804).

Almost surely, 2^728212807 is an apocalyptic number.

728212807 is a deficient number, since it is larger than the sum of its proper divisors (104030409).

728212807 is a wasteful number, since it uses less digits than its factorization.

728212807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104030408.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 728212807 is about 26985.4184143956. The cubic root of 728212807 is about 899.6759355910.

The spelling of 728212807 in words is "seven hundred twenty-eight million, two hundred twelve thousand, eight hundred seven".