8383539978 has 96 divisors (see below), whose sum is σ = 20331717120. Its totient is φ = 2474629920.

The previous prime is 8383539973. The next prime is 8383539991. The reversal of 8383539978 is 8799353838.

8383539978 is a `hidden beast` number, since 8 + 3 + 8 + 3 + 539 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (8383539973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3736525 + ... + 3738767.

It is an arithmetic number, because the mean of its divisors is an integer number (211788720).

Almost surely, 2^8383539978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8383539978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10165858560).

8383539978 is an abundant number, since it is smaller than the sum of its proper divisors (11948177142).

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

8383539978 is a wasteful number, since it uses less digits than its factorization.

8383539978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2741 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The square root of 8383539978 is about 91561.6730843206. The cubic root of 8383539978 is about 2031.4640750686.

The spelling of 8383539978 in words is "eight billion, three hundred eighty-three million, five hundred thirty-nine thousand, nine hundred seventy-eight".