7981916 has 12 divisors (see below), whose sum is σ = 14265888. Its totient is φ = 3905952.

The previous prime is 7981907. The next prime is 7981927. The reversal of 7981916 is 6191897.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21041 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (1188824).

Almost surely, 2^7981916 is an apocalyptic number.

It is an amenable number.

7981916 is a deficient number, since it is larger than the sum of its proper divisors (6283972).

7981916 is a wasteful number, since it uses less digits than its factorization.

7981916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42508 (or 42506 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 7981916 is about 2825.2284863352. The cubic root of 7981916 is about 199.8491863047.

The spelling of 7981916 in words is "seven million, nine hundred eighty-one thousand, nine hundred sixteen".