851138835 has 32 divisors (see below), whose sum is σ = 1410834240. Its totient is φ = 437649408.

The previous prime is 851138807. The next prime is 851138837. The reversal of 851138835 is 538831158.

It is a happy number.

It is not a de Polignac number, because 851138835 - 2⁸ = 851138579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851138837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500707 + ... + 502403.

It is an arithmetic number, because the mean of its divisors is an integer number (44088570).

Almost surely, 2^851138835 is an apocalyptic number.

851138835 is a deficient number, since it is larger than the sum of its proper divisors (559695405).

851138835 is a wasteful number, since it uses less digits than its factorization.

851138835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its digits is 115200, while the sum is 42.

The square root of 851138835 is about 29174.2837958364. The cubic root of 851138835 is about 947.6911002427.

The spelling of 851138835 in words is "eight hundred fifty-one million, one hundred thirty-eight thousand, eight hundred thirty-five".