320712638 has 8 divisors (see below), whose sum is σ = 481473120. Its totient is φ = 160221600.

The previous prime is 320712611. The next prime is 320712643. The reversal of 320712638 is 836217023.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64358 + ... + 69161.

It is an arithmetic number, because the mean of its divisors is an integer number (60184140).

Almost surely, 2^320712638 is an apocalyptic number.

320712638 is a deficient number, since it is larger than the sum of its proper divisors (160760482).

320712638 is a wasteful number, since it uses less digits than its factorization.

320712638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134722.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 320712638 is about 17908.4515801897. The cubic root of 320712638 is about 684.4977496523.

The spelling of 320712638 in words is "three hundred twenty million, seven hundred twelve thousand, six hundred thirty-eight".