3881606628 has 12 divisors (see below), whose sum is σ = 9057082160. Its totient is φ = 1293868872.

The previous prime is 3881606621. The next prime is 3881606647. The reversal of 3881606628 is 8266061883.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (3881606621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161733598 + ... + 161733621.

Almost surely, 2^3881606628 is an apocalyptic number.

It is an amenable number.

3881606628 is an abundant number, since it is smaller than the sum of its proper divisors (5175475532).

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

3881606628 is a wasteful number, since it uses less digits than its factorization.

3881606628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323467226 (or 323467224 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 3881606628 is about 62302.5411038747. The cubic root of 3881606628 is about 1571.5824616720.

The spelling of 3881606628 in words is "three billion, eight hundred eighty-one million, six hundred six thousand, six hundred twenty-eight".