320438887 has 8 divisors (see below), whose sum is σ = 322056000. Its totient is φ = 318826464.

The previous prime is 320438873. The next prime is 320438891. The reversal of 320438887 is 788834023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320438887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320438827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250293 + ... + 251569.

It is an arithmetic number, because the mean of its divisors is an integer number (40257000).

Almost surely, 2^320438887 is an apocalyptic number.

320438887 is a deficient number, since it is larger than the sum of its proper divisors (1617113).

320438887 is a wasteful number, since it uses less digits than its factorization.

320438887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 320438887 is about 17900.8068812554. The cubic root of 320438887 is about 684.3029384089.

The spelling of 320438887 in words is "three hundred twenty million, four hundred thirty-eight thousand, eight hundred eighty-seven".