8429057978 has 16 divisors (see below), whose sum is σ = 13853774304. Its totient is φ = 3814509360.

The previous prime is 8429057977. The next prime is 8429057981. The reversal of 8429057978 is 8797509248.

It is not an unprimeable number, because it can be changed into a prime (8429057971) 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, 838925 + ... + 848912.

It is an arithmetic number, because the mean of its divisors is an integer number (865860894).

Almost surely, 2^8429057978 is an apocalyptic number.

8429057978 is a deficient number, since it is larger than the sum of its proper divisors (5424716326).

8429057978 is a wasteful number, since it uses less digits than its factorization.

8429057978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688077.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The square root of 8429057978 is about 91809.9013069941. The cubic root of 8429057978 is about 2035.1340177803.

The spelling of 8429057978 in words is "eight billion, four hundred twenty-nine million, fifty-seven thousand, nine hundred seventy-eight".