728500920 has 64 divisors (see below), whose sum is σ = 2497720320. Its totient is φ = 166514304.

The previous prime is 728500889. The next prime is 728500939. The reversal of 728500920 is 29005827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432792 + ... + 434471.

It is an arithmetic number, because the mean of its divisors is an integer number (39026880).

Almost surely, 2^728500920 is an apocalyptic number.

728500920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

728500920 is an abundant number, since it is smaller than the sum of its proper divisors (1769219400).

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

728500920 is a wasteful number, since it uses less digits than its factorization.

728500920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867284 (or 867280 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 728500920 is about 26990.7561954088. The cubic root of 728500920 is about 899.7945703972.

The spelling of 728500920 in words is "seven hundred twenty-eight million, five hundred thousand, nine hundred twenty".