7216688 has 20 divisors (see below), whose sum is σ = 14031840. Its totient is φ = 3595584.

The previous prime is 7216673. The next prime is 7216691. The reversal of 7216688 is 8866127.

It is a super-3 number, since 3×7216688³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5258 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (701592).

Almost surely, 2^7216688 is an apocalyptic number.

It is an amenable number.

7216688 is a deficient number, since it is larger than the sum of its proper divisors (6815152).

7216688 is a wasteful number, since it uses less digits than its factorization.

7216688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1598 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 7216688 is about 2686.3893984305. The cubic root of 7216688 is about 193.2469477987.

The spelling of 7216688 in words is "seven million, two hundred sixteen thousand, six hundred eighty-eight".