8531406 has 40 divisors (see below), whose sum is σ = 20592264. Its totient is φ = 2624400.

The previous prime is 8531389. The next prime is 8531407. The reversal of 8531406 is 6041358.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 8531406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8531407) 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 19 ways as a sum of consecutive naturals, for example, 81 + ... + 4131.

Almost surely, 2^8531406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8531406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10296132).

8531406 is an abundant number, since it is smaller than the sum of its proper divisors (12060858).

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

8531406 is a wasteful number, since it uses less digits than its factorization.

8531406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 8531406 is about 2920.8570659996. The cubic root of 8531406 is about 204.3337960870. Note that the first 3 decimals are identical.

The spelling of 8531406 in words is "eight million, five hundred thirty-one thousand, four hundred six".