7897221480 has 256 divisors, whose sum is σ = 26097500160. Its totient is φ = 1903104000.

The previous prime is 7897221461. The next prime is 7897221481. The reversal of 7897221480 is 841227987.

It is a super-2 number, since 2×7897221480² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7897221481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9548827 + ... + 9549653.

It is an arithmetic number, because the mean of its divisors is an integer number (101943360).

Almost surely, 2^7897221480 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 7897221480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13048750080).

7897221480 is an abundant number, since it is smaller than the sum of its proper divisors (18200278680).

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

7897221480 is a wasteful number, since it uses less digits than its factorization.

7897221480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 7897221480 is about 88866.3124023946. The cubic root of 7897221480 is about 1991.3981807242.

The spelling of 7897221480 in words is "seven billion, eight hundred ninety-seven million, two hundred twenty-one thousand, four hundred eighty".