8670781440 has 336 divisors, whose sum is σ = 30812097888. Its totient is φ = 2254307328.

The previous prime is 8670781429. The next prime is 8670781447. The reversal of 8670781440 is 441870768.

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

It is not an unprimeable number, because it can be changed into a prime (8670781447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15851247 + ... + 15851793.

Almost surely, 2^8670781440 is an apocalyptic number.

8670781440 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 8670781440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15406048944).

8670781440 is an abundant number, since it is smaller than the sum of its proper divisors (22141316448).

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

8670781440 is a wasteful number, since it uses less digits than its factorization.

8670781440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 8670781440 is about 93117.0308805001. The cubic root of 8670781440 is about 2054.4050775779.

The spelling of 8670781440 in words is "eight billion, six hundred seventy million, seven hundred eighty-one thousand, four hundred forty".