320220434 has 4 divisors (see below), whose sum is σ = 480330654. Its totient is φ = 160110216.

The previous prime is 320220431. The next prime is 320220451. The reversal of 320220434 is 434022023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 257763025 + 62457409 = 16055^2 + 7903^2 .

It is a super-2 number, since 2×320220434² = 205082252702296712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320220431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80055107 + ... + 80055110.

Almost surely, 2^320220434 is an apocalyptic number.

320220434 is a deficient number, since it is larger than the sum of its proper divisors (160110220).

320220434 is a wasteful number, since it uses less digits than its factorization.

320220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160110219.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 320220434 is about 17894.7040769050. The cubic root of 320220434 is about 684.1473996370.

Adding to 320220434 its reverse (434022023), we get a palindrome (754242457).

The spelling of 320220434 in words is "three hundred twenty million, two hundred twenty thousand, four hundred thirty-four".