878003985 has 16 divisors (see below), whose sum is σ = 1407288960. Its totient is φ = 467441280.

The previous prime is 878003983. The next prime is 878004019. The reversal of 878003985 is 589300878.

It is a happy number.

It is not a de Polignac number, because 878003985 - 2¹ = 878003983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (878003983) 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 15 ways as a sum of consecutive naturals, for example, 42901 + ... + 59970.

It is an arithmetic number, because the mean of its divisors is an integer number (87955560).

Almost surely, 2^878003985 is an apocalyptic number.

It is an amenable number.

878003985 is a deficient number, since it is larger than the sum of its proper divisors (529284975).

878003985 is a wasteful number, since it uses less digits than its factorization.

878003985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103448.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 878003985 is about 29631.1320235998. The cubic root of 878003985 is about 957.5588967264.

The spelling of 878003985 in words is "eight hundred seventy-eight million, three thousand, nine hundred eighty-five".