320724434 has 8 divisors (see below), whose sum is σ = 485500620. Its totient is φ = 158890896.

The previous prime is 320724409. The next prime is 320724449. The reversal of 320724434 is 434427023.

It can be written as a sum of positive squares in 2 ways, for example, as 320517409 + 207025 = 17903^2 + 455^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 320724397 and 320724406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735389 + ... + 735824.

Almost surely, 2^320724434 is an apocalyptic number.

320724434 is a deficient number, since it is larger than the sum of its proper divisors (164776186).

320724434 is a wasteful number, since it uses less digits than its factorization.

320724434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471324.

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 320724434 is about 17908.7809188677. The cubic root of 320724434 is about 684.5061416264.

The spelling of 320724434 in words is "three hundred twenty million, seven hundred twenty-four thousand, four hundred thirty-four".