323428644 has 108 divisors (see below), whose sum is σ = 1027108992. Its totient is φ = 83999520.

The previous prime is 323428603. The next prime is 323428657. The reversal of 323428644 is 446824323.

323428644 is a `hidden beast` number, since 3 + 2 + 3 + 4 + 2 + 8 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 323428599 and 323428608.

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 35 ways as a sum of consecutive naturals, for example, 25189 + ... + 35795.

Almost surely, 2^323428644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 323428644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513554496).

323428644 is an abundant number, since it is smaller than the sum of its proper divisors (703680348).

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

323428644 is a wasteful number, since it uses less digits than its factorization.

323428644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646 (or 10630 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 323428644 is about 17984.1219969172. The cubic root of 323428644 is about 686.4245799876.

It can be divided in two parts, 3234 and 28644, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 323428644 in words is "three hundred twenty-three million, four hundred twenty-eight thousand, six hundred forty-four".