728377920 has 672 divisors, whose sum is σ = 2995574400. Its totient is φ = 167215104.

The previous prime is 728377913. The next prime is 728377933. The reversal of 728377920 is 29773827.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25116466 + ... + 25116494.

It is an arithmetic number, because the mean of its divisors is an integer number (4457700).

Almost surely, 2^728377920 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 728377920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497787200).

728377920 is an abundant number, since it is smaller than the sum of its proper divisors (2267196480).

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

728377920 is a wasteful number, since it uses less digits than its factorization.

728377920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 728377920 is about 26988.4775413509. The cubic root of 728377920 is about 899.7439271477.

The spelling of 728377920 in words is "seven hundred twenty-eight million, three hundred seventy-seven thousand, nine hundred twenty".