7218078 has 32 divisors (see below), whose sum is σ = 16692480. Its totient is φ = 2038080.

The previous prime is 7218059. The next prime is 7218083. The reversal of 7218078 is 8708127.

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 15 ways as a sum of consecutive naturals, for example, 2773 + ... + 4703.

It is an arithmetic number, because the mean of its divisors is an integer number (521640).

Almost surely, 2^7218078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7218078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8346240).

7218078 is an abundant number, since it is smaller than the sum of its proper divisors (9474402).

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

7218078 is a wasteful number, since it uses less digits than its factorization.

7218078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 7218078 is about 2686.6480975372. The cubic root of 7218078 is about 193.2593540444.

The spelling of 7218078 in words is "seven million, two hundred eighteen thousand, seventy-eight".