3086821 has 8 divisors (see below), whose sum is σ = 3173760. Its totient is φ = 3001152.

The previous prime is 3086813. The next prime is 3086861. The reversal of 3086821 is 1286803.

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

It is a cyclic number.

It is not a de Polignac number, because 3086821 - 2³ = 3086813 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 3086821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3086801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6436 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (396720).

Almost surely, 2^3086821 is an apocalyptic number.

It is an amenable number.

3086821 is a deficient number, since it is larger than the sum of its proper divisors (86939).

3086821 is a wasteful number, since it uses less digits than its factorization.

3086821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 3086821 is about 1756.9351154781. The cubic root of 3086821 is about 145.6030532357.

The spelling of 3086821 in words is "three million, eighty-six thousand, eight hundred twenty-one".