320400030 has 32 divisors (see below), whose sum is σ = 780441984. Its totient is φ = 84164256.

The previous prime is 320400019. The next prime is 320400043. The reversal of 320400030 is 30004023.

It is a junction number, because it is equal to n+sod(n) for n = 320399979 and 320400015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77692 + ... + 81711.

It is an arithmetic number, because the mean of its divisors is an integer number (24388812).

Almost surely, 2^320400030 is an apocalyptic number.

320400030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320400030 is an abundant number, since it is smaller than the sum of its proper divisors (460041954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320400030 is a wasteful number, since it uses less digits than its factorization.

320400030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159480.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 320400030 is about 17899.7215062134. The cubic root of 320400030 is about 684.2752773528.

Adding to 320400030 its reverse (30004023), we get a palindrome (350404053).

The spelling of 320400030 in words is "three hundred twenty million, four hundred thousand, thirty".