8210540 has 48 divisors (see below), whose sum is σ = 19389888. Its totient is φ = 2897664.

The previous prime is 8210533. The next prime is 8210561. The reversal of 8210540 is 450128.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5294 + ... + 6666.

It is an arithmetic number, because the mean of its divisors is an integer number (403956).

Almost surely, 2^8210540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8210540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9694944).

8210540 is an abundant number, since it is smaller than the sum of its proper divisors (11179348).

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

8210540 is a wasteful number, since it uses less digits than its factorization.

8210540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 8210540 is about 2865.4039854792. The cubic root of 8210540 is about 201.7393298096.

Adding to 8210540 its reverse (450128), we get a palindrome (8660668).

The spelling of 8210540 in words is "eight million, two hundred ten thousand, five hundred forty".