8997478560 has 432 divisors, whose sum is σ = 36802636416. Its totient is φ = 1957165056.

The previous prime is 8997478559. The next prime is 8997478561. The reversal of 8997478560 is 658747998.

It is an interprime number because it is at equal distance from previous prime (8997478559) and next prime (8997478561).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8997478561) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 45672382 + ... + 45672578.

It is an arithmetic number, because the mean of its divisors is an integer number (85191288).

Almost surely, 2^8997478560 is an apocalyptic number.

8997478560 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 8997478560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18401318208).

8997478560 is an abundant number, since it is smaller than the sum of its proper divisors (27805157856).

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

8997478560 is a wasteful number, since it uses less digits than its factorization.

8997478560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The square root of 8997478560 is about 94855.0397185094. The cubic root of 8997478560 is about 2079.8895528139.

The spelling of 8997478560 in words is "eight billion, nine hundred ninety-seven million, four hundred seventy-eight thousand, five hundred sixty".