730400 has 72 divisors (see below), whose sum is σ = 1968624. Its totient is φ = 262400.

The previous prime is 730399. The next prime is 730421. The reversal of 730400 is 4037.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8759 + ... + 8841.

It is an arithmetic number, because the mean of its divisors is an integer number (27342).

2⁷³⁰⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 730400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984312).

730400 is an abundant number, since it is smaller than the sum of its proper divisors (1238224).

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

730400 is a wasteful number, since it uses less digits than its factorization.

730400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 730400 is about 854.6344247689. The cubic root of 730400 is about 90.0575763272.

Adding to 730400 its reverse (4037), we get a palindrome (734437).

The spelling of 730400 in words is "seven hundred thirty thousand, four hundred".