326886865920 has 792 divisors, whose sum is σ = 1212539369184. Its totient is φ = 84491403264.

The previous prime is 326886865909. The next prime is 326886865999. The reversal of 326886865920 is 29568688623.

326886865920 is a `hidden beast` number, since 32 + 6 + 8 + 8 + 6 + 8 + 6 + 592 + 0 = 666.

It is a super-2 number, since 2×326886865920² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1242915709 + ... + 1242915971.

It is an arithmetic number, because the mean of its divisors is an integer number (1530984052).

Almost surely, 2^326886865920 is an apocalyptic number.

326886865920 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 326886865920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606269684592).

326886865920 is an abundant number, since it is smaller than the sum of its proper divisors (885652503264).

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

326886865920 is an frugal number, since it uses more digits than its factorization.

326886865920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 326886865920 in words is "three hundred twenty-six billion, eight hundred eighty-six million, eight hundred sixty-five thousand, nine hundred twenty".