8470840 has 32 divisors (see below), whose sum is σ = 21782880. Its totient is φ = 2904192.

The previous prime is 8470837. The next prime is 8470841. The reversal of 8470840 is 480748.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8470841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14847 + ... + 15406.

It is an arithmetic number, because the mean of its divisors is an integer number (680715).

Almost surely, 2^8470840 is an apocalyptic number.

It is an amenable number.

8470840 is an abundant number, since it is smaller than the sum of its proper divisors (13312040).

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

8470840 is a wasteful number, since it uses less digits than its factorization.

8470840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30271 (or 30267 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 8470840 is about 2910.4707523011. The cubic root of 8470840 is about 203.8491130824.

It can be divided in two parts, 84708 and 40, that added together give a palindrome (84748).

The spelling of 8470840 in words is "eight million, four hundred seventy thousand, eight hundred forty".