320288855 has 8 divisors (see below), whose sum is σ = 386360064. Its totient is φ = 254888800.

The previous prime is 320288851. The next prime is 320288863. The reversal of 320288855 is 558882023.

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

It is not a de Polignac number, because 320288855 - 2² = 320288851 is a prime.

It is a super-2 number, since 2×320288855² = 205169901274422050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320288851) 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, 166736 + ... + 168645.

It is an arithmetic number, because the mean of its divisors is an integer number (48295008).

Almost surely, 2^320288855 is an apocalyptic number.

320288855 is a deficient number, since it is larger than the sum of its proper divisors (66071209).

320288855 is a wasteful number, since it uses less digits than its factorization.

320288855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335577.

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 320288855 is about 17896.6157415306. The cubic root of 320288855 is about 684.1961230691.

The spelling of 320288855 in words is "three hundred twenty million, two hundred eighty-eight thousand, eight hundred fifty-five".