7221287880 has 192 divisors, whose sum is σ = 25201238400. Its totient is φ = 1786767360.

The previous prime is 7221287867. The next prime is 7221287903. The reversal of 7221287880 is 887821227.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 426211 + ... + 442829.

It is an arithmetic number, because the mean of its divisors is an integer number (131256450).

Almost surely, 2^7221287880 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 7221287880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12600619200).

7221287880 is an abundant number, since it is smaller than the sum of its proper divisors (17979950520).

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

7221287880 is a wasteful number, since it uses less digits than its factorization.

7221287880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16724 (or 16717 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 7221287880 is about 84978.1611945093. The cubic root of 7221287880 is about 1932.8799728353.

The spelling of 7221287880 in words is "seven billion, two hundred twenty-one million, two hundred eighty-seven thousand, eight hundred eighty".