8581842 has 16 divisors (see below), whose sum is σ = 19070880. Its totient is φ = 2860596.

The previous prime is 8581819. The next prime is 8581843. The reversal of 8581842 is 2481858.

It is a super-2 number, since 2×8581842² = 147296024225928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8581797 and 8581806.

It is not an unprimeable number, because it can be changed into a prime (8581843) 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 7 ways as a sum of consecutive naturals, for example, 79408 + ... + 79515.

It is an arithmetic number, because the mean of its divisors is an integer number (1191930).

Almost surely, 2^8581842 is an apocalyptic number.

8581842 is an abundant number, since it is smaller than the sum of its proper divisors (10489038).

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

8581842 is a wasteful number, since it uses less digits than its factorization.

8581842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158934 (or 158928 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 8581842 is about 2929.4781105173. The cubic root of 8581842 is about 204.7356656497.

The spelling of 8581842 in words is "eight million, five hundred eighty-one thousand, eight hundred forty-two".