320428711 has 4 divisors (see below), whose sum is σ = 337293400. Its totient is φ = 303564024.

The previous prime is 320428687. The next prime is 320428723. The reversal of 320428711 is 117824023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117824023 = 5119 ⋅23017.

It is a cyclic number.

It is not a de Polignac number, because 320428711 - 2⁷ = 320428583 is a prime.

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 320428711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320428811) 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, 8432316 + ... + 8432353.

It is an arithmetic number, because the mean of its divisors is an integer number (84323350).

Almost surely, 2^320428711 is an apocalyptic number.

320428711 is a deficient number, since it is larger than the sum of its proper divisors (16864689).

320428711 is a wasteful number, since it uses less digits than its factorization.

320428711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16864688.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 320428711 is about 17900.5226460011. The cubic root of 320428711 is about 684.2956946559.

The spelling of 320428711 in words is "three hundred twenty million, four hundred twenty-eight thousand, seven hundred eleven".