3821809128 has 32 divisors (see below), whose sum is σ = 9571348800. Its totient is φ = 1271692928.

The previous prime is 3821809067. The next prime is 3821809133. The reversal of 3821809128 is 8219081283.

It is a self number, because there is not a number n which added to its sum of digits gives 3821809128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126276 + ... + 153587.

It is an arithmetic number, because the mean of its divisors is an integer number (299104650).

Almost surely, 2^3821809128 is an apocalyptic number.

It is an amenable number.

3821809128 is an abundant number, since it is smaller than the sum of its proper divisors (5749539672).

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

3821809128 is a wasteful number, since it uses less digits than its factorization.

3821809128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280441 (or 280437 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 3821809128 is about 61820.7823308635. The cubic root of 3821809128 is about 1563.4704034744.

The spelling of 3821809128 in words is "three billion, eight hundred twenty-one million, eight hundred nine thousand, one hundred twenty-eight".