8280981720 has 192 divisors, whose sum is σ = 29485067040. Its totient is φ = 1998950400.

The previous prime is 8280981703. The next prime is 8280981727. The reversal of 8280981720 is 271890828.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8280981727) by changing a digit.

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, 950022 + ... + 958698.

Almost surely, 2^8280981720 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 8280981720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14742533520).

8280981720 is an abundant number, since it is smaller than the sum of its proper divisors (21204085320).

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

8280981720 is a wasteful number, since it uses less digits than its factorization.

8280981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946 (or 8939 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 8280981720 is about 90999.8995603841. The cubic root of 8280981720 is about 2023.1462358370.

The spelling of 8280981720 in words is "eight billion, two hundred eighty million, nine hundred eighty-one thousand, seven hundred twenty".