8394440 has 16 divisors (see below), whose sum is σ = 18887580. Its totient is φ = 3357760.

The previous prime is 8394439. The next prime is 8394467. The reversal of 8394440 is 444938.

It can be written as a sum of positive squares in 2 ways, for example, as 8282884 + 111556 = 2878^2 + 334^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8394397 and 8394406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104891 + ... + 104970.

Almost surely, 2^8394440 is an apocalyptic number.

It is an amenable number.

8394440 is an abundant number, since it is smaller than the sum of its proper divisors (10493140).

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

8394440 is a wasteful number, since it uses less digits than its factorization.

8394440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209872 (or 209868 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 8394440 is about 2897.3159993346. The cubic root of 8394440 is about 203.2344109578.

The spelling of 8394440 in words is "eight million, three hundred ninety-four thousand, four hundred forty".