839729994 has 32 divisors (see below), whose sum is σ = 1779589440. Its totient is φ = 263246592.

The previous prime is 839729987. The next prime is 839730013. The reversal of 839729994 is 499927938.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195037 + ... + 199295.

It is an arithmetic number, because the mean of its divisors is an integer number (55612170).

Almost surely, 2^839729994 is an apocalyptic number.

839729994 is an abundant number, since it is smaller than the sum of its proper divisors (939859446).

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

839729994 is a wasteful number, since it uses less digits than its factorization.

839729994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214.

The product of its digits is 8817984, while the sum is 60.

The square root of 839729994 is about 28978.0950719677. The cubic root of 839729994 is about 943.4376895405.

The spelling of 839729994 in words is "eight hundred thirty-nine million, seven hundred twenty-nine thousand, nine hundred ninety-four".