3808821 has 8 divisors (see below), whose sum is σ = 5110240. Its totient is φ = 2523312.

The previous prime is 3808813. The next prime is 3808829. The reversal of 3808821 is 1288083.

It is an interprime number because it is at equal distance from previous prime (3808813) and next prime (3808829).

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

It is not a de Polignac number, because 3808821 - 2³ = 3808813 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 (3808829) 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, 3406 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (638780).

Almost surely, 2^3808821 is an apocalyptic number.

It is an amenable number.

3808821 is a deficient number, since it is larger than the sum of its proper divisors (1301419).

3808821 is a wasteful number, since it uses less digits than its factorization.

3808821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 3808821 is about 1951.6200962277. The cubic root of 3808821 is about 156.1697281549.

The spelling of 3808821 in words is "three million, eight hundred eight thousand, eight hundred twenty-one".