320422399 has 24 divisors (see below), whose sum is σ = 360095904. Its totient is φ = 284856000.

The previous prime is 320422393. The next prime is 320422481. The reversal of 320422399 is 993224023.

It is a happy number.

It is not a de Polignac number, because 320422399 - 2¹³ = 320414207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320422393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1918614 + ... + 1918780.

It is an arithmetic number, because the mean of its divisors is an integer number (15003996).

Almost surely, 2^320422399 is an apocalyptic number.

320422399 is a deficient number, since it is larger than the sum of its proper divisors (39673505).

320422399 is a wasteful number, since it uses less digits than its factorization.

320422399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 320422399 is about 17900.3463374316. The cubic root of 320422399 is about 684.2912014019.

It can be divided in two parts, 3 and 20422399, that added together give a palindrome (20422402).

The spelling of 320422399 in words is "three hundred twenty million, four hundred twenty-two thousand, three hundred ninety-nine".