728880353444 has 24 divisors (see below), whose sum is σ = 1314995803968. Its totient is φ = 353242170720.

The previous prime is 728880353423. The next prime is 728880353491. The reversal of 728880353444 is 444353088827.

It is a super-2 number, since 2×728880353444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728880353444.

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, 9323942 + ... + 9401789.

It is an arithmetic number, because the mean of its divisors is an integer number (54791491832).

Almost surely, 2^728880353444 is an apocalyptic number.

728880353444 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

728880353444 is a deficient number, since it is larger than the sum of its proper divisors (586115450524).

728880353444 is a wasteful number, since it uses less digits than its factorization.

728880353444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18726035 (or 18726033 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 56.

The spelling of 728880353444 in words is "seven hundred twenty-eight billion, eight hundred eighty million, three hundred fifty-three thousand, four hundred forty-four".