8856642240 has 168 divisors, whose sum is σ = 30892930848. Its totient is φ = 2328453120.

The previous prime is 8856642229. The next prime is 8856642241. The reversal of 8856642240 is 422466588.

8856642240 is a `hidden beast` number, since 8 + 8 + 566 + 42 + 2 + 40 = 666.

It is a super-2 number, since 2×8856642240² (a number of 21 digits) contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (8856642241) 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, 182824 + ... + 226136.

Almost surely, 2^8856642240 is an apocalyptic number.

8856642240 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 8856642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15446465424).

8856642240 is an abundant number, since it is smaller than the sum of its proper divisors (22036288608).

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

8856642240 is a wasteful number, since it uses less digits than its factorization.

8856642240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43407 (or 43394 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 8856642240 is about 94109.7350968538. The cubic root of 8856642240 is about 2068.9803561878.

The spelling of 8856642240 in words is "eight billion, eight hundred fifty-six million, six hundred forty-two thousand, two hundred forty".