3878084221 has 8 divisors (see below), whose sum is σ = 4367109888. Its totient is φ = 3411804000.

The previous prime is 3878084207. The next prime is 3878084269. The reversal of 3878084221 is 1224808783.

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

It is a de Polignac number, because none of the positive numbers 2^k-3878084221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878084291) 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, 5686000 + ... + 5686681.

It is an arithmetic number, because the mean of its divisors is an integer number (545888736).

Almost surely, 2^3878084221 is an apocalyptic number.

3878084221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3878084221 is a deficient number, since it is larger than the sum of its proper divisors (489025667).

3878084221 is a wasteful number, since it uses less digits than its factorization.

3878084221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11372723.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 3878084221 is about 62274.2661217296. The cubic root of 3878084221 is about 1571.1069344885.

The spelling of 3878084221 in words is "three billion, eight hundred seventy-eight million, eighty-four thousand, two hundred twenty-one".