7220249280 has 504 divisors, whose sum is σ = 27295784880. Its totient is φ = 1813985280.

The previous prime is 7220249279. The next prime is 7220249327. The reversal of 7220249280 is 829420227.

It is a happy number.

7220249280 is a `hidden beast` number, since 72 + 20 + 2 + 492 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 39890790 + ... + 39890970.

Almost surely, 2^7220249280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7220249280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13647892440).

7220249280 is an abundant number, since it is smaller than the sum of its proper divisors (20075535600).

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

7220249280 is an equidigital number, since it uses as much as digits as its factorization.

7220249280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 7220249280 is about 84972.0499929241. The cubic root of 7220249280 is about 1932.7873030594.

The spelling of 7220249280 in words is "seven billion, two hundred twenty million, two hundred forty-nine thousand, two hundred eighty".