7981136 has 20 divisors (see below), whose sum is σ = 15963264. Its totient is φ = 3861600.

The previous prime is 7981123. The next prime is 7981139. The reversal of 7981136 is 6311897.

7981136 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 7981096 and 7981105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7550 + ... + 8541.

Almost surely, 2^7981136 is an apocalyptic number.

It is an amenable number.

7981136 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7981136 is a wasteful number, since it uses less digits than its factorization.

7981136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16130 (or 16124 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 7981136 is about 2825.0904410302. The cubic root of 7981136 is about 199.8426762787.

The spelling of 7981136 in words is "seven million, nine hundred eighty-one thousand, one hundred thirty-six".