8840813 has 6 divisors (see below), whose sum is σ = 8922126. Its totient is φ = 8760152.

The previous prime is 8840779. The next prime is 8840857. The reversal of 8840813 is 3180488.

It can be written as a sum of positive squares in only one way, i.e., 5466244 + 3374569 = 2338^2 + 1837^2 .

It is not a de Polignac number, because 8840813 - 2⁶ = 8840749 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 8840813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8840863) 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 5 ways as a sum of consecutive naturals, for example, 27731 + ... + 28047.

It is an arithmetic number, because the mean of its divisors is an integer number (1487021).

Almost surely, 2^8840813 is an apocalyptic number.

It is an amenable number.

8840813 is a deficient number, since it is larger than the sum of its proper divisors (81313).

8840813 is an equidigital number, since it uses as much as digits as its factorization.

8840813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 8840813 is about 2973.3504670657. The cubic root of 8840813 is about 206.7747010020.

The spelling of 8840813 in words is "eight million, eight hundred forty thousand, eight hundred thirteen".