728700 has 72 divisors (see below), whose sum is σ = 2416512. Its totient is φ = 166080.

The previous prime is 728699. The next prime is 728701. The reversal of 728700 is 7827.

728700 = 75² + 76² + ... + 137².

It is an interprime number because it is at equal distance from previous prime (728699) and next prime (728701).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1927 + ... + 2273.

2⁷²⁸⁷⁰⁰ is an apocalyptic number.

728700 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208256).

728700 is an abundant number, since it is smaller than the sum of its proper divisors (1687812).

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

728700 is a wasteful number, since it uses less digits than its factorization.

728700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 728700 is about 853.6392680752. The cubic root of 728700 is about 89.9876526271.

The spelling of 728700 in words is "seven hundred twenty-eight thousand, seven hundred".