8494128720 has 320 divisors, whose sum is σ = 36477665280. Its totient is φ = 1764979200.

The previous prime is 8494128701. The next prime is 8494128749. The reversal of 8494128720 is 278214948.

It is a Smith number, since the sum of its digits (45) 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140785 + ... + 191855.

It is an arithmetic number, because the mean of its divisors is an integer number (113992704).

Almost surely, 2^8494128720 is an apocalyptic number.

8494128720 is a gapful number since it is divisible by the number (80) 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 8494128720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18238832640).

8494128720 is an abundant number, since it is smaller than the sum of its proper divisors (27983536560).

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

8494128720 is a wasteful number, since it uses less digits than its factorization.

8494128720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51111 (or 51099 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 8494128720 is about 92163.5975860318. The cubic root of 8494128720 is about 2040.3575497855.

It can be divided in two parts, 84 and 94128720, that added together give a square (94128804 = 9702²).

The spelling of 8494128720 in words is "eight billion, four hundred ninety-four million, one hundred twenty-eight thousand, seven hundred twenty".