728213138399 has 8 divisors (see below), whose sum is σ = 730083361920. Its totient is φ = 726343581600.

The previous prime is 728213138363. The next prime is 728213138413. The reversal of 728213138399 is 993831312827.

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 728213138399 - 2¹² = 728213134303 is a prime.

It is a super-2 number, since 2×728213138399² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728213138599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2058629 + ... + 2386289.

It is an arithmetic number, because the mean of its divisors is an integer number (91260420240).

Almost surely, 2^728213138399 is an apocalyptic number.

728213138399 is a deficient number, since it is larger than the sum of its proper divisors (1870223521).

728213138399 is a wasteful number, since it uses less digits than its factorization.

728213138399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333361.

The product of its digits is 3919104, while the sum is 56.

The spelling of 728213138399 in words is "seven hundred twenty-eight billion, two hundred thirteen million, one hundred thirty-eight thousand, three hundred ninety-nine".