728000421450 has 48 divisors (see below), whose sum is σ = 1805526123456. Its totient is φ = 194124297600.

The previous prime is 728000421409. The next prime is 728000421503. The reversal of 728000421450 is 54124000827.

It is a super-2 number, since 2×728000421450² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3448134 + ... + 3653166.

It is an arithmetic number, because the mean of its divisors is an integer number (37615127572).

Almost surely, 2^728000421450 is an apocalyptic number.

728000421450 is an abundant number, since it is smaller than the sum of its proper divisors (1077525702006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728000421450 is a wasteful number, since it uses less digits than its factorization.

728000421450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228719 (or 228714 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The spelling of 728000421450 in words is "seven hundred twenty-eight billion, four hundred twenty-one thousand, four hundred fifty".