728376320 has 88 divisors (see below), whose sum is σ = 1996954944. Its totient is φ = 249716736.

The previous prime is 728376283. The next prime is 728376323. The reversal of 728376320 is 23673827.

It is not an unprimeable number, because it can be changed into a prime (728376323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25679 + ... + 46001.

Almost surely, 2^728376320 is an apocalyptic number.

728376320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728376320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998477472).

728376320 is an abundant number, since it is smaller than the sum of its proper divisors (1268578624).

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

728376320 is a wasteful number, since it uses less digits than its factorization.

728376320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20355 (or 20337 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 728376320 is about 26988.4478990549. The cubic root of 728376320 is about 899.7432683361.

The spelling of 728376320 in words is "seven hundred twenty-eight million, three hundred seventy-six thousand, three hundred twenty".