728764920 has 96 divisors (see below), whose sum is σ = 2550693600. Its totient is φ = 179387136.

The previous prime is 728764919. The next prime is 728764937. The reversal of 728764920 is 29467827.

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

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, 73180 + ... + 82539.

It is an arithmetic number, because the mean of its divisors is an integer number (26569725).

Almost surely, 2^728764920 is an apocalyptic number.

It is an amenable number.

728764920 is an abundant number, since it is smaller than the sum of its proper divisors (1821928680).

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

728764920 is a wasteful number, since it uses less digits than its factorization.

728764920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155749 (or 155742 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 728764920 is about 26995.6463156562. The cubic root of 728764920 is about 899.9032488588.

The spelling of 728764920 in words is "seven hundred twenty-eight million, seven hundred sixty-four thousand, nine hundred twenty".