728744820 has 48 divisors (see below), whose sum is σ = 2045796480. Its totient is φ = 193826176.

The previous prime is 728744789. The next prime is 728744827. The reversal of 728744820 is 28447827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728744827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7729 + ... + 38951.

It is an arithmetic number, because the mean of its divisors is an integer number (42620760).

Almost surely, 2^728744820 is an apocalyptic number.

It is an amenable number.

728744820 is an abundant number, since it is smaller than the sum of its proper divisors (1317051660).

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

728744820 is a wasteful number, since it uses less digits than its factorization.

728744820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31624 (or 31622 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The square root of 728744820 is about 26995.2740308373. The cubic root of 728744820 is about 899.8949753991.

The spelling of 728744820 in words is "seven hundred twenty-eight million, seven hundred forty-four thousand, eight hundred twenty".