320880405 has 32 divisors (see below), whose sum is σ = 527003136. Its totient is φ = 166630464.

The previous prime is 320880403. The next prime is 320880431. The reversal of 320880405 is 504088023.

It is not a de Polignac number, because 320880405 - 2¹ = 320880403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320880403) 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 31 ways as a sum of consecutive naturals, for example, 285174 + ... + 286296.

It is an arithmetic number, because the mean of its divisors is an integer number (16468848).

Almost surely, 2^320880405 is an apocalyptic number.

It is an amenable number.

320880405 is a deficient number, since it is larger than the sum of its proper divisors (206122731).

320880405 is a wasteful number, since it uses less digits than its factorization.

320880405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 320880405 is about 17913.1349852559. The cubic root of 320880405 is about 684.6170840162.

The spelling of 320880405 in words is "three hundred twenty million, eight hundred eighty thousand, four hundred five".