728430 has 16 divisors (see below), whose sum is σ = 1748304. Its totient is φ = 194240.

The previous prime is 728423. The next prime is 728437. The reversal of 728430 is 34827.

It is an interprime number because it is at equal distance from previous prime (728423) and next prime (728437).

It is a super-2 number, since 2×728430² = 1061220529800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12111 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (109269).

2⁷²⁸⁴³⁰ is an apocalyptic number.

728430 is an abundant number, since it is smaller than the sum of its proper divisors (1019874).

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

728430 is a wasteful number, since it uses less digits than its factorization.

728430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24291.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 728430 is about 853.4811069965. The cubic root of 728430 is about 89.9765370937.

The spelling of 728430 in words is "seven hundred twenty-eight thousand, four hundred thirty".