8730389 has 4 divisors (see below), whose sum is σ = 8761740. Its totient is φ = 8699040.

The previous prime is 8730377. The next prime is 8730467. The reversal of 8730389 is 9830378.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5428900 + 3301489 = 2330^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 8730389 - 2²⁰ = 7681813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8730349) by changing a digit.

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, 15254 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (2190435).

Almost surely, 2^8730389 is an apocalyptic number.

It is an amenable number.

8730389 is a deficient number, since it is larger than the sum of its proper divisors (31351).

8730389 is a wasteful number, since it uses less digits than its factorization.

8730389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31350.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 8730389 is about 2954.7231680819. The cubic root of 8730389 is about 205.9102021663.

It can be divided in two parts, 8730 and 389, that added together give a palindrome (9119).

The spelling of 8730389 in words is "eight million, seven hundred thirty thousand, three hundred eighty-nine".