8400447 has 24 divisors (see below), whose sum is σ = 13495248. Its totient is φ = 4992000.

The previous prime is 8400439. The next prime is 8400461. The reversal of 8400447 is 7440048.

It is not a de Polignac number, because 8400447 - 2³ = 8400439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8400447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8400047) 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 23 ways as a sum of consecutive naturals, for example, 4447 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (562302).

Almost surely, 2^8400447 is an apocalyptic number.

8400447 is a deficient number, since it is larger than the sum of its proper divisors (5094801).

8400447 is a wasteful number, since it uses less digits than its factorization.

8400447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 8400447 is about 2898.3524630383. The cubic root of 8400447 is about 203.2828770861.

The spelling of 8400447 in words is "eight million, four hundred thousand, four hundred forty-seven".