730240 has 64 divisors (see below), whose sum is σ = 2007360. Its totient is φ = 248832.

The previous prime is 730237. The next prime is 730253. The reversal of 730240 is 42037.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4399 + ... + 4561.

It is an arithmetic number, because the mean of its divisors is an integer number (31365).

2⁷³⁰²⁴⁰ is an apocalyptic number.

730240 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 730240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003680).

730240 is an abundant number, since it is smaller than the sum of its proper divisors (1277120).

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

730240 is a wasteful number, since it uses less digits than its factorization.

730240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 730240 is about 854.5408123665. The cubic root of 730240 is about 90.0509999012.

Adding to 730240 its reverse (42037), we get a palindrome (772277).

The spelling of 730240 in words is "seven hundred thirty thousand, two hundred forty".