320404612 has 18 divisors (see below), whose sum is σ = 616316414. Its totient is φ = 145638240.

The previous prime is 320404603. The next prime is 320404621. The reversal of 320404612 is 216404023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320404603) and next prime (320404621).

It can be written as a sum of positive squares in only one way, i.e., 319908996 + 495616 = 17886^2 + 704^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 330513 + ... + 331480.

Almost surely, 2^320404612 is an apocalyptic number.

It is an amenable number.

320404612 is a deficient number, since it is larger than the sum of its proper divisors (295911802).

320404612 is a wasteful number, since it uses less digits than its factorization.

320404612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662019 (or 662006 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 320404612 is about 17899.8494965740. The cubic root of 320404612 is about 684.2785392484.

Adding to 320404612 its reverse (216404023), we get a palindrome (536808635).

The spelling of 320404612 in words is "three hundred twenty million, four hundred four thousand, six hundred twelve".