728345145424 has 40 divisors (see below), whose sum is σ = 1520382767400. Its totient is φ = 336012730368.

The previous prime is 728345145419. The next prime is 728345145431. The reversal of 728345145424 is 424541543827.

It can be written as a sum of positive squares in 4 ways, for example, as 91828393024 + 636516752400 = 303032^2 + 797820^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284449 + ... + 1240000.

It is an arithmetic number, because the mean of its divisors is an integer number (38009569185).

Almost surely, 2^728345145424 is an apocalyptic number.

It is an amenable number.

728345145424 is an abundant number, since it is smaller than the sum of its proper divisors (792037621976).

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

728345145424 is a wasteful number, since it uses less digits than its factorization.

728345145424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526767 (or 1526761 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 49.

The spelling of 728345145424 in words is "seven hundred twenty-eight billion, three hundred forty-five million, one hundred forty-five thousand, four hundred twenty-four".