728988 has 24 divisors (see below), whose sum is σ = 1832208. Its totient is φ = 224256.

The previous prime is 728971. The next prime is 728993. The reversal of 728988 is 889827.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

728988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 2492.

It is an arithmetic number, because the mean of its divisors is an integer number (76342).

2⁷²⁸⁹⁸⁸ is an apocalyptic number.

728988 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

728988 is an abundant number, since it is smaller than the sum of its proper divisors (1103220).

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

728988 is a wasteful number, since it uses less digits than its factorization.

728988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4691 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 728988 is about 853.8079409329. The cubic root of 728988 is about 89.9995061701. Note that the first 3 decimals are identical.

The spelling of 728988 in words is "seven hundred twenty-eight thousand, nine hundred eighty-eight".