8408440 has 32 divisors (see below), whose sum is σ = 19532160. Its totient is φ = 3254400.

The previous prime is 8408437. The next prime is 8408447. The reversal of 8408440 is 448048.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8408399 and 8408408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8408447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 4630.

It is an arithmetic number, because the mean of its divisors is an integer number (610380).

Almost surely, 2^8408440 is an apocalyptic number.

It is an amenable number.

8408440 is an abundant number, since it is smaller than the sum of its proper divisors (11123720).

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

8408440 is a wasteful number, since it uses less digits than its factorization.

8408440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823 (or 6819 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 8408440 is about 2899.7310220088. The cubic root of 8408440 is about 203.3473309961.

The spelling of 8408440 in words is "eight million, four hundred eight thousand, four hundred forty".