326987805690 has 768 divisors, whose sum is σ = 1150636032000. Its totient is φ = 64880206848.

The previous prime is 326987805673. The next prime is 326987805743. The reversal of 326987805690 is 96508789623.

326987805690 is a `hidden beast` number, since 3 + 2 + 69 + 8 + 7 + 8 + 0 + 569 + 0 = 666.

It is a super-2 number, since 2×326987805690² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 936927636 + ... + 936927984.

It is an arithmetic number, because the mean of its divisors is an integer number (1498224000).

Almost surely, 2^326987805690 is an apocalyptic number.

326987805690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 326987805690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575318016000).

326987805690 is an abundant number, since it is smaller than the sum of its proper divisors (823648226310).

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

326987805690 is a wasteful number, since it uses less digits than its factorization.

326987805690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 326987805690 in words is "three hundred twenty-six billion, nine hundred eighty-seven million, eight hundred five thousand, six hundred ninety".