7216406 has 16 divisors (see below), whose sum is σ = 11228544. Its totient is φ = 3475584.

The previous prime is 7216403. The next prime is 7216421. The reversal of 7216406 is 6046127.

It is a super-3 number, since 3×7216406³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7931 + ... + 8793.

It is an arithmetic number, because the mean of its divisors is an integer number (701784).

Almost surely, 2^7216406 is an apocalyptic number.

7216406 is a deficient number, since it is larger than the sum of its proper divisors (4012138).

7216406 is a wasteful number, since it uses less digits than its factorization.

7216406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 7216406 is about 2686.3369111115. The cubic root of 7216406 is about 193.2444306537.

The spelling of 7216406 in words is "seven million, two hundred sixteen thousand, four hundred six".