8691287040 has 440 divisors, whose sum is σ = 32813573760. Its totient is φ = 2193702912.

The previous prime is 8691286999. The next prime is 8691287041. The reversal of 8691287040 is 407821968.

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 (8691287041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7879129 + ... + 7880231.

It is an arithmetic number, because the mean of its divisors is an integer number (74576304).

Almost surely, 2^8691287040 is an apocalyptic number.

8691287040 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 8691287040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16406786880).

8691287040 is an abundant number, since it is smaller than the sum of its proper divisors (24122286720).

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

8691287040 is a wasteful number, since it uses less digits than its factorization.

8691287040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 8691287040 is about 93227.0724628849. The cubic root of 8691287040 is about 2056.0232955720.

The spelling of 8691287040 in words is "eight billion, six hundred ninety-one million, two hundred eighty-seven thousand, forty".