7218764 has 24 divisors (see below), whose sum is σ = 14504448. Its totient is φ = 3079440.

The previous prime is 7218763. The next prime is 7218769. The reversal of 7218764 is 4678127.

It is a happy number.

It is a super-2 number, since 2×7218764² = 104221107375392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7218763) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 8379.

It is an arithmetic number, because the mean of its divisors is an integer number (604352).

Almost surely, 2^7218764 is an apocalyptic number.

It is an amenable number.

7218764 is an abundant number, since it is smaller than the sum of its proper divisors (7285684).

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

7218764 is a wasteful number, since it uses less digits than its factorization.

7218764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 7218764 is about 2686.7757628801. The cubic root of 7218764 is about 193.2654762520.

The spelling of 7218764 in words is "seven million, two hundred eighteen thousand, seven hundred sixty-four".