8818821 has 32 divisors (see below), whose sum is σ = 14883840. Its totient is φ = 5108400.

The previous prime is 8818819. The next prime is 8818879. The reversal of 8818821 is 1288188.

It is a happy number.

It is not a de Polignac number, because 8818821 - 2¹ = 8818819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8818811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6186 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (465120).

Almost surely, 2^8818821 is an apocalyptic number.

It is an amenable number.

8818821 is a deficient number, since it is larger than the sum of its proper divisors (6065019).

8818821 is a wasteful number, since it uses less digits than its factorization.

8818821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1328 counting only the distinct ones).

The product of its digits is 8192, while the sum is 36.

The square root of 8818821 is about 2969.6499793747. The cubic root of 8818821 is about 206.6031042243.

It can be divided in two parts, 88188 and 21, that added together give a square (88209 = 297²).

The spelling of 8818821 in words is "eight million, eight hundred eighteen thousand, eight hundred twenty-one".