323123220 has 288 divisors, whose sum is σ = 1195084800. Its totient is φ = 69092352.

The previous prime is 323123189. The next prime is 323123263. The reversal of 323123220 is 22321323.

It is a happy number.

323123220 is a `hidden beast` number, since 32 + 312 + 322 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 323123193 and 323123202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1351861 + ... + 1352099.

It is an arithmetic number, because the mean of its divisors is an integer number (4149600).

Almost surely, 2^323123220 is an apocalyptic number.

323123220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 323123220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597542400).

323123220 is an abundant number, since it is smaller than the sum of its proper divisors (871961580).

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

323123220 is a wasteful number, since it uses less digits than its factorization.

323123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 323123220 is about 17975.6285008341. The cubic root of 323123220 is about 686.2084410518.

Adding to 323123220 its reverse (22321323), we get a palindrome (345444543).

The spelling of 323123220 in words is "three hundred twenty-three million, one hundred twenty-three thousand, two hundred twenty".