8820491 has 4 divisors (see below), whose sum is σ = 8826672. Its totient is φ = 8814312.

The previous prime is 8820481. The next prime is 8820499. The reversal of 8820491 is 1940288.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8820491 - 2¹⁰ = 8819467 is a prime.

It is a super-2 number, since 2×8820491² = 155602122962162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8820499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266 + ... + 4208.

It is an arithmetic number, because the mean of its divisors is an integer number (2206668).

Almost surely, 2^8820491 is an apocalyptic number.

8820491 is a deficient number, since it is larger than the sum of its proper divisors (6181).

8820491 is a wasteful number, since it uses less digits than its factorization.

8820491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8820491 is about 2969.9311439830. The cubic root of 8820491 is about 206.6161447205.

The spelling of 8820491 in words is "eight million, eight hundred twenty thousand, four hundred ninety-one".