730578239 has 4 divisors (see below), whose sum is σ = 730660656. Its totient is φ = 730495824.

The previous prime is 730578229. The next prime is 730578241. The reversal of 730578239 is 932875037.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 730578239 - 2²⁸ = 462142783 is a prime.

It is a super-2 number, since 2×730578239² = 1067489126600682242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 730578239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730578229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26054 + ... + 46259.

It is an arithmetic number, because the mean of its divisors is an integer number (182665164).

Almost surely, 2^730578239 is an apocalyptic number.

730578239 is a deficient number, since it is larger than the sum of its proper divisors (82417).

730578239 is a wasteful number, since it uses less digits than its factorization.

730578239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82416.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 730578239 is about 27029.2108467857. The cubic root of 730578239 is about 900.6490129377.

The spelling of 730578239 in words is "seven hundred thirty million, five hundred seventy-eight thousand, two hundred thirty-nine".