834672138 has 8 divisors (see below), whose sum is σ = 1669344288. Its totient is φ = 278224044.

The previous prime is 834672121. The next prime is 834672161. The reversal of 834672138 is 831276438.

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

834672138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 834672138.

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, 69556006 + ... + 69556017.

It is an arithmetic number, because the mean of its divisors is an integer number (208668036).

Almost surely, 2^834672138 is an apocalyptic number.

834672138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

834672138 is a wasteful number, since it uses less digits than its factorization.

834672138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139112028.

The product of its digits is 193536, while the sum is 42.

The square root of 834672138 is about 28890.6929304231. The cubic root of 834672138 is about 941.5397046187.

The spelling of 834672138 in words is "eight hundred thirty-four million, six hundred seventy-two thousand, one hundred thirty-eight".