7216686 has 12 divisors (see below), whose sum is σ = 15636192. Its totient is φ = 2405556.

The previous prime is 7216673. The next prime is 7216691. The reversal of 7216686 is 6866127.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7216686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200446 + ... + 200481.

It is an arithmetic number, because the mean of its divisors is an integer number (1303016).

Almost surely, 2^7216686 is an apocalyptic number.

7216686 is an abundant number, since it is smaller than the sum of its proper divisors (8419506).

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

7216686 is a wasteful number, since it uses less digits than its factorization.

7216686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400935 (or 400932 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7216686 is about 2686.3890261837. The cubic root of 7216686 is about 193.2469299468.

The spelling of 7216686 in words is "seven million, two hundred sixteen thousand, six hundred eighty-six".