7218274944 has 128 divisors (see below), whose sum is σ = 19932252480. Its totient is φ = 2312478720.

The previous prime is 7218274913. The next prime is 7218274991. The reversal of 7218274944 is 4494728127.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 7218274893 and 7218274902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176204 + ... + 1182324.

Almost surely, 2^7218274944 is an apocalyptic number.

7218274944 is a gapful number since it is divisible by the number (74) 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 7218274944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9966126240).

7218274944 is an abundant number, since it is smaller than the sum of its proper divisors (12713977536).

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

7218274944 is a wasteful number, since it uses less digits than its factorization.

7218274944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6258 (or 6246 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 7218274944 is about 84960.4316373216. The cubic root of 7218274944 is about 1932.6111171099.

The spelling of 7218274944 in words is "seven billion, two hundred eighteen million, two hundred seventy-four thousand, nine hundred forty-four".