8161956 has 36 divisors (see below), whose sum is σ = 22508304. Its totient is φ = 2473200.

The previous prime is 8161949. The next prime is 8161957. The reversal of 8161956 is 6591618.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 8161956.

It is not an unprimeable number, because it can be changed into a prime (8161957) 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 11 ways as a sum of consecutive naturals, for example, 9910 + ... + 10701.

Almost surely, 2^8161956 is an apocalyptic number.

It is an amenable number.

8161956 is an abundant number, since it is smaller than the sum of its proper divisors (14346348).

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

8161956 is a wasteful number, since it uses less digits than its factorization.

8161956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20632 (or 20627 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 8161956 is about 2856.9137193832. The cubic root of 8161956 is about 201.3406268525.

It can be divided in two parts, 816 and 1956, that added together give a palindrome (2772).

The spelling of 8161956 in words is "eight million, one hundred sixty-one thousand, nine hundred fifty-six".