8855121240 has 192 divisors, whose sum is σ = 33562152000. Its totient is φ = 2023999488.

The previous prime is 8855121239. The next prime is 8855121257. The reversal of 8855121240 is 421215588.

8855121240 is a `hidden beast` number, since 88 + 551 + 2 + 1 + 24 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8855121195 and 8855121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87624 + ... + 159336.

It is an arithmetic number, because the mean of its divisors is an integer number (174802875).

Almost surely, 2^8855121240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8855121240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16781076000).

8855121240 is an abundant number, since it is smaller than the sum of its proper divisors (24707030760).

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

8855121240 is a wasteful number, since it uses less digits than its factorization.

8855121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71751 (or 71730 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 8855121240 is about 94101.6537580504. The cubic root of 8855121240 is about 2068.8619102727.

The spelling of 8855121240 in words is "eight billion, eight hundred fifty-five million, one hundred twenty-one thousand, two hundred forty".