6729442838 has 16 divisors (see below), whose sum is σ = 10639975920. Its totient is φ = 3183268896.

The previous prime is 6729442789. The next prime is 6729442849. The reversal of 6729442838 is 8382449276.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6729442838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92945 + ... + 148652.

It is an arithmetic number, because the mean of its divisors is an integer number (664998495).

Almost surely, 2^6729442838 is an apocalyptic number.

6729442838 is a deficient number, since it is larger than the sum of its proper divisors (3910533082).

6729442838 is a wasteful number, since it uses less digits than its factorization.

6729442838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242351.

The product of its digits is 4644864, while the sum is 53.

The square root of 6729442838 is about 82033.1813231695. The cubic root of 6729442838 is about 1887.9610756587.

The spelling of 6729442838 in words is "six billion, seven hundred twenty-nine million, four hundred forty-two thousand, eight hundred thirty-eight".