851120138 has 16 divisors (see below), whose sum is σ = 1393732224. Its totient is φ = 386597760.

The previous prime is 851120117. The next prime is 851120141. The reversal of 851120138 is 831021158.

It is a self number, because there is not a number n which added to its sum of digits gives 851120138.

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, 19706 + ... + 45722.

It is an arithmetic number, because the mean of its divisors is an integer number (87108264).

Almost surely, 2^851120138 is an apocalyptic number.

851120138 is a deficient number, since it is larger than the sum of its proper divisors (542612086).

851120138 is a wasteful number, since it uses less digits than its factorization.

851120138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27517.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 851120138 is about 29173.9633577613. The cubic root of 851120138 is about 947.6841608695.

The spelling of 851120138 in words is "eight hundred fifty-one million, one hundred twenty thousand, one hundred thirty-eight".