851070138 has 8 divisors (see below), whose sum is σ = 1702140288. Its totient is φ = 283690044.

The previous prime is 851070019. The next prime is 851070139. The reversal of 851070138 is 831070158.

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

851070138 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 851070099 and 851070108.

It is not an unprimeable number, because it can be changed into a prime (851070139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70922506 + ... + 70922517.

It is an arithmetic number, because the mean of its divisors is an integer number (212767536).

Almost surely, 2^851070138 is an apocalyptic number.

851070138 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.

851070138 is a wasteful number, since it uses less digits than its factorization.

851070138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141845028.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 851070138 is about 29173.1064166982. The cubic root of 851070138 is about 947.6656029191.

The spelling of 851070138 in words is "eight hundred fifty-one million, seventy thousand, one hundred thirty-eight".