323639680 has 128 divisors (see below), whose sum is σ = 952418880. Its totient is φ = 102408192.

The previous prime is 323639669. The next prime is 323639683. The reversal of 323639680 is 86936323.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323639683) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 55462 + ... + 61018.

Almost surely, 2^323639680 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 323639680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476209440).

323639680 is an abundant number, since it is smaller than the sum of its proper divisors (628779200).

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

323639680 is a wasteful number, since it uses less digits than its factorization.

323639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5596 (or 5584 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 323639680 is about 17989.9883268445. The cubic root of 323639680 is about 686.5738440317.

The spelling of 323639680 in words is "three hundred twenty-three million, six hundred thirty-nine thousand, six hundred eighty".