8390178816 has 96 divisors (see below), whose sum is σ = 22407840000. Its totient is φ = 2791792640.

The previous prime is 8390178781. The next prime is 8390178817. The reversal of 8390178816 is 6188710938.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8390178817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5596435 + ... + 5597933.

It is an arithmetic number, because the mean of its divisors is an integer number (233415000).

Almost surely, 2^8390178816 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 8390178816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11203920000).

8390178816 is an abundant number, since it is smaller than the sum of its proper divisors (14017661184).

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

8390178816 is a wasteful number, since it uses less digits than its factorization.

8390178816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2415 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 8390178816 is about 91597.9192776779. The cubic root of 8390178816 is about 2032.0001653337. Note that the first 3 decimals are identical.

The spelling of 8390178816 in words is "eight billion, three hundred ninety million, one hundred seventy-eight thousand, eight hundred sixteen".