3838646021 has 8 divisors (see below), whose sum is σ = 4528541184. Its totient is φ = 3184130160.

The previous prime is 3838645963. The next prime is 3838646029. The reversal of 3838646021 is 1206468383.

It is a happy number.

3838646021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3838646021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3838646021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3838646029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8844590 + ... + 8845023.

It is an arithmetic number, because the mean of its divisors is an integer number (566067648).

Almost surely, 2^3838646021 is an apocalyptic number.

3838646021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3838646021 is a deficient number, since it is larger than the sum of its proper divisors (689895163).

3838646021 is a wasteful number, since it uses less digits than its factorization.

3838646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17689651.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 3838646021 is about 61956.8077050456. The cubic root of 3838646021 is about 1565.7629845336.

The spelling of 3838646021 in words is "three billion, eight hundred thirty-eight million, six hundred forty-six thousand, twenty-one".