730520 has 32 divisors (see below), whose sum is σ = 1879200. Its totient is φ = 250368.

The previous prime is 730487. The next prime is 730537. The reversal of 730520 is 25037.

It is a congruent number.

It is an unprimeable number.

730520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (58725).

2⁷³⁰⁵²⁰ is an apocalyptic number.

730520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

730520 is an abundant number, since it is smaller than the sum of its proper divisors (1148680).

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

730520 is a wasteful number, since it uses less digits than its factorization.

730520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 730520 is about 854.7046273421. The cubic root of 730520 is about 90.0625080164.

Adding to 730520 its reverse (25037), we get a palindrome (755557).

The spelling of 730520 in words is "seven hundred thirty thousand, five hundred twenty".