320407 has 4 divisors (see below), whose sum is σ = 321640. Its totient is φ = 319176.

The previous prime is 320401. The next prime is 320417. The reversal of 320407 is 704023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320407 is a prime.

It is a Duffinian number.

320407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (80410).

2³²⁰⁴⁰⁷ is an apocalyptic number.

320407 is a deficient number, since it is larger than the sum of its proper divisors (1233).

320407 is an equidigital number, since it uses as much as digits as its factorization.

320407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 320407 is about 566.0450512106. The cubic root of 320407 is about 68.4280239238.

It can be divided in two parts, 320 and 407, that added together give a palindrome (727).

The spelling of 320407 in words is "three hundred twenty thousand, four hundred seven", and thus it is an iban number.