8857821456 has 405 divisors, whose sum is σ = 29432765271. Its totient is φ = 2484662400.

The previous prime is 8857821443. The next prime is 8857821473. The reversal of 8857821456 is 6541287588.

The square root of 8857821456 is 94116.

It is a perfect power (a square), and thus also a powerful number.

8857821456 is a `hidden beast` number, since 8 + 8 + 578 + 2 + 14 + 56 = 666.

It is a super-2 number, since 2×8857821456² (a number of 21 digits) contains 22 as substring.

Its product of digits (4300800) is a multiple of the sum of its prime divisors (70).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 285736161 + ... + 285736191.

Almost surely, 2^8857821456 is an apocalyptic number.

8857821456 is the 94116-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8857821456

8857821456 is an abundant number, since it is smaller than the sum of its proper divisors (20574943815).

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

8857821456 is a wasteful number, since it uses less digits than its factorization.

8857821456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 70 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The cubic root of 8857821456 is about 2069.0721767823.

The spelling of 8857821456 in words is "eight billion, eight hundred fifty-seven million, eight hundred twenty-one thousand, four hundred fifty-six".