842810138 has 8 divisors (see below), whose sum is σ = 1265148180. Its totient is φ = 421094080.

The previous prime is 842810117. The next prime is 842810141. The reversal of 842810138 is 831018248.

It can be written as a sum of positive squares in 2 ways, for example, as 827310169 + 15499969 = 28763^2 + 3937^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 842810098 and 842810107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152093 + ... + 157536.

Almost surely, 2^842810138 is an apocalyptic number.

842810138 is a deficient number, since it is larger than the sum of its proper divisors (422338042).

842810138 is a wasteful number, since it uses less digits than its factorization.

842810138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310992.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 842810138 is about 29031.1925004813. The cubic root of 842810138 is about 944.5897972375.

The spelling of 842810138 in words is "eight hundred forty-two million, eight hundred ten thousand, one hundred thirty-eight".