728490 has 32 divisors (see below), whose sum is σ = 1998720. Its totient is φ = 166464.

The previous prime is 728489. The next prime is 728521. The reversal of 728490 is 94827.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525 + ... + 1944.

It is an arithmetic number, because the mean of its divisors is an integer number (62460).

2⁷²⁸⁴⁹⁰ is an apocalyptic number.

728490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

728490 is an abundant number, since it is smaller than the sum of its proper divisors (1270230).

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

728490 is a wasteful number, since it uses less digits than its factorization.

728490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 728490 is about 853.5162564357. The cubic root of 728490 is about 89.9790074495.

The spelling of 728490 in words is "seven hundred twenty-eight thousand, four hundred ninety".