8978523840 has 896 divisors, whose sum is σ = 38302387200. Its totient is φ = 1962455040.

The previous prime is 8978523839. The next prime is 8978523901. The reversal of 8978523840 is 483258798.

It is a happy number.

8978523840 is a `hidden beast` number, since 8 + 9 + 78 + 523 + 8 + 40 = 666.

It is a super-2 number, since 2×8978523840² (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 an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 208802859 + ... + 208802901.

It is an arithmetic number, because the mean of its divisors is an integer number (42748200).

Almost surely, 2^8978523840 is an apocalyptic number.

8978523840 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 8978523840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19151193600).

8978523840 is an abundant number, since it is smaller than the sum of its proper divisors (29323863360).

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

8978523840 is a wasteful number, since it uses less digits than its factorization.

8978523840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The square root of 8978523840 is about 94755.0728984997. The cubic root of 8978523840 is about 2078.4279788648.

The spelling of 8978523840 in words is "eight billion, nine hundred seventy-eight million, five hundred twenty-three thousand, eight hundred forty".