8131380 has 48 divisors (see below), whose sum is σ = 23163840. Its totient is φ = 2130688.

The previous prime is 8131369. The next prime is 8131399. The reversal of 8131380 is 831318.

It is a super-2 number, since 2×8131380² = 132238681408800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8131380.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2392 + ... + 4688.

It is an arithmetic number, because the mean of its divisors is an integer number (482580).

Almost surely, 2^8131380 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 8131380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11581920).

8131380 is an abundant number, since it is smaller than the sum of its proper divisors (15032460).

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

8131380 is a wasteful number, since it uses less digits than its factorization.

8131380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368 (or 2366 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8131380 is about 2851.5574691736. The cubic root of 8131380 is about 201.0888941222.

Adding to 8131380 its reverse (831318), we get a palindrome (8962698).

The spelling of 8131380 in words is "eight million, one hundred thirty-one thousand, three hundred eighty".