728284920 has 64 divisors (see below), whose sum is σ = 2383482240. Its totient is φ = 176553600.

The previous prime is 728284919. The next prime is 728284933. The reversal of 728284920 is 29482827.

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, 274546 + ... + 277185.

It is an arithmetic number, because the mean of its divisors is an integer number (37241910).

Almost surely, 2^728284920 is an apocalyptic number.

It is an amenable number.

728284920 is an abundant number, since it is smaller than the sum of its proper divisors (1655197320).

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

728284920 is a wasteful number, since it uses less digits than its factorization.

728284920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551756 (or 551752 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 728284920 is about 26986.7545288425. The cubic root of 728284920 is about 899.7056321251.

The spelling of 728284920 in words is "seven hundred twenty-eight million, two hundred eighty-four thousand, nine hundred twenty".