320428743 has 8 divisors (see below), whose sum is σ = 441970800. Its totient is φ = 206252928.

The previous prime is 320428723. The next prime is 320428753. The reversal of 320428743 is 347824023.

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

It is not a de Polignac number, because 320428743 - 2⁹ = 320428231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320428723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841458 + ... + 1841631.

It is an arithmetic number, because the mean of its divisors is an integer number (55246350).

Almost surely, 2^320428743 is an apocalyptic number.

320428743 is a deficient number, since it is larger than the sum of its proper divisors (121542057).

320428743 is a wasteful number, since it uses less digits than its factorization.

320428743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683121.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 320428743 is about 17900.5235398298. The cubic root of 320428743 is about 684.2957174353.

The spelling of 320428743 in words is "three hundred twenty million, four hundred twenty-eight thousand, seven hundred forty-three".