7819218 has 96 divisors (see below), whose sum is σ = 20621952. Its totient is φ = 2112000.

The previous prime is 7819193. The next prime is 7819219. The reversal of 7819218 is 8129187.

It is a super-2 number, since 2×7819218² = 122280340263048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7819219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77368 + ... + 77468.

It is an arithmetic number, because the mean of its divisors is an integer number (214812).

Almost surely, 2^7819218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7819218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10310976).

7819218 is an abundant number, since it is smaller than the sum of its proper divisors (12802734).

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

7819218 is a wasteful number, since it uses less digits than its factorization.

7819218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 157 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 7819218 is about 2796.2864660117. The cubic root of 7819218 is about 198.4819907227.

It can be divided in two parts, 78192 and 18, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 7819218 in words is "seven million, eight hundred nineteen thousand, two hundred eighteen".