728000421449 has 16 divisors (see below), whose sum is σ = 843445488000. Its totient is φ = 615417575040.

The previous prime is 728000421409. The next prime is 728000421503. The reversal of 728000421449 is 944124000827.

It is a cyclic number.

It is not a de Polignac number, because 728000421449 - 2¹⁶ = 728000355913 is a prime.

It is a super-2 number, since 2×728000421449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728000421409) 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 15 ways as a sum of consecutive naturals, for example, 13330802 + ... + 13385300.

It is an arithmetic number, because the mean of its divisors is an integer number (52715343000).

Almost surely, 2^728000421449 is an apocalyptic number.

It is an amenable number.

728000421449 is a deficient number, since it is larger than the sum of its proper divisors (115445066551).

728000421449 is a wasteful number, since it uses less digits than its factorization.

728000421449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80720.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 728000421449 in words is "seven hundred twenty-eight billion, four hundred twenty-one thousand, four hundred forty-nine".