730805 has 4 divisors (see below), whose sum is σ = 876972. Its totient is φ = 584640.

The previous prime is 730799. The next prime is 730811. The reversal of 730805 is 508037.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (730799) and next prime (730811).

It can be written as a sum of positive squares in 2 ways, for example, as 407044 + 323761 = 638^2 + 569^2 .

It is not a de Polignac number, because 730805 - 2⁴ = 730789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73076 + ... + 73085.

It is an arithmetic number, because the mean of its divisors is an integer number (219243).

2⁷³⁰⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

730805 is a deficient number, since it is larger than the sum of its proper divisors (146167).

730805 is a wasteful number, since it uses less digits than its factorization.

730805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146166.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 730805 is about 854.8713353482. The cubic root of 730805 is about 90.0742186141.

The spelling of 730805 in words is "seven hundred thirty thousand, eight hundred five".