730505 has 8 divisors (see below), whose sum is σ = 882312. Its totient is φ = 580608.

The previous prime is 730487. The next prime is 730537. The reversal of 730505 is 505037.

It can be written as a sum of positive squares in 4 ways, for example, as 43264 + 687241 = 208^2 + 829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730505 is a prime.

It is a Duffinian number.

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, 587 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (110289).

2⁷³⁰⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

730505 is a deficient number, since it is larger than the sum of its proper divisors (151807).

730505 is a wasteful number, since it uses less digits than its factorization.

730505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 730505 is about 854.6958523358. The cubic root of 730505 is about 90.0618915848.

The spelling of 730505 in words is "seven hundred thirty thousand, five hundred five".