3881818380 has 48 divisors (see below), whose sum is σ = 11857192704. Its totient is φ = 941046720.

The previous prime is 3881818327. The next prime is 3881818397. The reversal of 3881818380 is 838181883.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2940112 + ... + 2941431.

It is an arithmetic number, because the mean of its divisors is an integer number (247024848).

Almost surely, 2^3881818380 is an apocalyptic number.

3881818380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3881818380 is an abundant number, since it is smaller than the sum of its proper divisors (7975374324).

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

3881818380 is a wasteful number, since it uses less digits than its factorization.

3881818380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881566 (or 5881564 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 3881818380 is about 62304.2404656376. The cubic root of 3881818380 is about 1571.6110391581.

The spelling of 3881818380 in words is "three billion, eight hundred eighty-one million, eight hundred eighteen thousand, three hundred eighty".