8531040 has 96 divisors (see below), whose sum is σ = 30723840. Its totient is φ = 1949184.

The previous prime is 8531023. The next prime is 8531051. The reversal of 8531040 is 401358.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 8530998 and 8531016.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2091 + ... + 4629.

It is an arithmetic number, because the mean of its divisors is an integer number (320040).

Almost surely, 2^8531040 is an apocalyptic number.

8531040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8531040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15361920).

8531040 is an abundant number, since it is smaller than the sum of its proper divisors (22192800).

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

8531040 is a wasteful number, since it uses less digits than its factorization.

8531040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 8531040 is about 2920.7944124844. The cubic root of 8531040 is about 204.3308740505.

Adding to 8531040 its reverse (401358), we get a palindrome (8932398).

It can be divided in two parts, 85 and 31040, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 8531040 in words is "eight million, five hundred thirty-one thousand, forty".