8209940 has 12 divisors (see below), whose sum is σ = 17240916. Its totient is φ = 3283968.

The previous prime is 8209937. The next prime is 8209951. The reversal of 8209940 is 499028.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 6130576 = 1442^2 + 2476^2 .

It is a super-2 number, since 2×8209940² = 134806229607200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8209897 and 8209906.

It is a congruent number.

It is an unprimeable number.

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, 205229 + ... + 205268.

It is an arithmetic number, because the mean of its divisors is an integer number (1436743).

Almost surely, 2^8209940 is an apocalyptic number.

It is an amenable number.

8209940 is an abundant number, since it is smaller than the sum of its proper divisors (9030976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8209940 is a wasteful number, since it uses less digits than its factorization.

8209940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410506 (or 410504 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 8209940 is about 2865.2992862876. The cubic root of 8209940 is about 201.7344155349.

The spelling of 8209940 in words is "eight million, two hundred nine thousand, nine hundred forty".