320078655 has 128 divisors (see below), whose sum is σ = 669312000. Its totient is φ = 143700480.

The previous prime is 320078641. The next prime is 320078659. The reversal of 320078655 is 556870023.

It is not a de Polignac number, because 320078655 - 2⁴ = 320078639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320078659) 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 127 ways as a sum of consecutive naturals, for example, 966840 + ... + 967170.

It is an arithmetic number, because the mean of its divisors is an integer number (5229000).

Almost surely, 2^320078655 is an apocalyptic number.

320078655 is an abundant number, since it is smaller than the sum of its proper divisors (349233345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320078655 is a wasteful number, since it uses less digits than its factorization.

320078655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 320078655 is about 17890.7421590050. The cubic root of 320078655 is about 684.0464149789.

The spelling of 320078655 in words is "three hundred twenty million, seventy-eight thousand, six hundred fifty-five".