728335380 has 72 divisors (see below), whose sum is σ = 2096182368. Its totient is φ = 188952192.

The previous prime is 728335331. The next prime is 728335441. The reversal of 728335380 is 83533827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77707 + ... + 86573.

It is an arithmetic number, because the mean of its divisors is an integer number (29113644).

Almost surely, 2^728335380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728335380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048091184).

728335380 is an abundant number, since it is smaller than the sum of its proper divisors (1367846988).

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

728335380 is a wasteful number, since it uses less digits than its factorization.

728335380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953 (or 8914 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 728335380 is about 26987.6894157318. The cubic root of 728335380 is about 899.7264106677.

The spelling of 728335380 in words is "seven hundred twenty-eight million, three hundred thirty-five thousand, three hundred eighty".