3827221643 has 16 divisors (see below), whose sum is σ = 4569346560. Its totient is φ = 3134267136.

The previous prime is 3827221639. The next prime is 3827221663. The reversal of 3827221643 is 3461227283.

It is not a de Polignac number, because 3827221643 - 2² = 3827221639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3827221597 and 3827221606.

It is not an unprimeable number, because it can be changed into a prime (3827221603) 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, 132923 + ... + 159131.

It is an arithmetic number, because the mean of its divisors is an integer number (285584160).

Almost surely, 2^3827221643 is an apocalyptic number.

3827221643 is a deficient number, since it is larger than the sum of its proper divisors (742124917).

3827221643 is a wasteful number, since it uses less digits than its factorization.

3827221643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27146.

The product of its digits is 96768, while the sum is 38.

The square root of 3827221643 is about 61864.5426961196. The cubic root of 3827221643 is about 1564.2081269839.

The spelling of 3827221643 in words is "three billion, eight hundred twenty-seven million, two hundred twenty-one thousand, six hundred forty-three".