7218683628 has 96 divisors (see below), whose sum is σ = 18377135616. Its totient is φ = 2192182272.

The previous prime is 7218683627. The next prime is 7218683629. The reversal of 7218683628 is 8263868127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7218683627) and next prime (7218683629).

It is not an unprimeable number, because it can be changed into a prime (7218683627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4988001 + ... + 4989447.

It is an arithmetic number, because the mean of its divisors is an integer number (191428496).

Almost surely, 2^7218683628 is an apocalyptic number.

7218683628 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7218683628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9188567808).

7218683628 is an abundant number, since it is smaller than the sum of its proper divisors (11158451988).

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

7218683628 is a wasteful number, since it uses less digits than its factorization.

7218683628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 1861 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 7218683628 is about 84962.8367464270. The cubic root of 7218683628 is about 1932.6475899210.

The spelling of 7218683628 in words is "seven billion, two hundred eighteen million, six hundred eighty-three thousand, six hundred twenty-eight".