320400130 has 8 divisors (see below), whose sum is σ = 576720252. Its totient is φ = 128160048.

The previous prime is 320400109. The next prime is 320400133. The reversal of 320400130 is 31004023.

It can be written as a sum of positive squares in 2 ways, for example, as 256352121 + 64048009 = 16011^2 + 8003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 320400130.

It is not an unprimeable number, because it can be changed into a prime (320400133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16019997 + ... + 16020016.

Almost surely, 2^320400130 is an apocalyptic number.

320400130 is a deficient number, since it is larger than the sum of its proper divisors (256320122).

320400130 is a wasteful number, since it uses less digits than its factorization.

320400130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32040020.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320400130 is about 17899.7242995528. The cubic root of 320400130 is about 684.2753485424.

Adding to 320400130 its reverse (31004023), we get a palindrome (351404153).

The spelling of 320400130 in words is "three hundred twenty million, four hundred thousand, one hundred thirty".