6829421978 has 8 divisors (see below), whose sum is σ = 10783297920. Its totient is φ = 3234989340.

The previous prime is 6829421909. The next prime is 6829421983. The reversal of 6829421978 is 8791249286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89860778 + ... + 89860853.

It is an arithmetic number, because the mean of its divisors is an integer number (1347912240).

Almost surely, 2^6829421978 is an apocalyptic number.

6829421978 is a deficient number, since it is larger than the sum of its proper divisors (3953875942).

6829421978 is a wasteful number, since it uses less digits than its factorization.

6829421978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179721652.

The product of its digits is 3483648, while the sum is 56.

The square root of 6829421978 is about 82640.3169040390. The cubic root of 6829421978 is about 1897.2649454734.

The spelling of 6829421978 in words is "six billion, eight hundred twenty-nine million, four hundred twenty-one thousand, nine hundred seventy-eight".