8471440 has 40 divisors (see below), whose sum is σ = 20858040. Its totient is φ = 3188736.

The previous prime is 8471399. The next prime is 8471447. The reversal of 8471440 is 441748.

8471440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1752976 + 6718464 = 1324^2 + 2592^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 8471399 and 8471408.

It is not an unprimeable number, because it can be changed into a prime (8471447) 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, 1755 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (521451).

Almost surely, 2^8471440 is an apocalyptic number.

8471440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8471440 is an abundant number, since it is smaller than the sum of its proper divisors (12386600).

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

8471440 is a wasteful number, since it uses less digits than its factorization.

8471440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6259 (or 6253 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 8471440 is about 2910.5738265847. The cubic root of 8471440 is about 203.8539259298.

It can be divided in two parts, 8471 and 440, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 8471440 in words is "eight million, four hundred seventy-one thousand, four hundred forty".