8978495220 has 168 divisors, whose sum is σ = 29758105440. Its totient is φ = 2268181440.

The previous prime is 8978495213. The next prime is 8978495237. The reversal of 8978495220 is 225948798.

8978495220 is a `hidden beast` number, since 8 + 9 + 78 + 49 + 522 + 0 = 666.

It is a super-2 number, since 2×8978495220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 260815 + ... + 293225.

It is an arithmetic number, because the mean of its divisors is an integer number (177131580).

Almost surely, 2^8978495220 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 8978495220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14879052720).

8978495220 is an abundant number, since it is smaller than the sum of its proper divisors (20779610220).

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

8978495220 is a wasteful number, since it uses less digits than its factorization.

8978495220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32457 (or 32440 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 8978495220 is about 94754.9218774413. The cubic root of 8978495220 is about 2078.4257704590.

The spelling of 8978495220 in words is "eight billion, nine hundred seventy-eight million, four hundred ninety-five thousand, two hundred twenty".