328962209781 has 16 divisors (see below), whose sum is σ = 443069662464. Its totient is φ = 217090520064.

The previous prime is 328962209773. The next prime is 328962209783. The reversal of 328962209781 is 187902269823.

It is a happy number.

It is not a de Polignac number, because 328962209781 - 2³ = 328962209773 is a prime.

It is a super-2 number, since 2×328962209781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328962209783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988621 + ... + 1278786.

It is an arithmetic number, because the mean of its divisors is an integer number (27691853904).

Almost surely, 2^328962209781 is an apocalyptic number.

It is an amenable number.

328962209781 is a deficient number, since it is larger than the sum of its proper divisors (114107452683).

328962209781 is a wasteful number, since it uses less digits than its factorization.

328962209781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267900.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 328962209781 in words is "three hundred twenty-eight billion, nine hundred sixty-two million, two hundred nine thousand, seven hundred eighty-one".