861085835 has 8 divisors (see below), whose sum is σ = 1068934320. Its totient is φ = 665114464.

The previous prime is 861085831. The next prime is 861085843. The reversal of 861085835 is 538580168.

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

It is a cyclic number.

It is not a de Polignac number, because 861085835 - 2² = 861085831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861085831) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2969117 + ... + 2969406.

It is an arithmetic number, because the mean of its divisors is an integer number (133616790).

Almost surely, 2^861085835 is an apocalyptic number.

861085835 is a deficient number, since it is larger than the sum of its proper divisors (207848485).

861085835 is a wasteful number, since it uses less digits than its factorization.

861085835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5938557.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 861085835 is about 29344.2640902784. The cubic root of 861085835 is about 951.3686035718.

The spelling of 861085835 in words is "eight hundred sixty-one million, eighty-five thousand, eight hundred thirty-five".