878632985 has 4 divisors (see below), whose sum is σ = 1054359588. Its totient is φ = 702906384.

The previous prime is 878632973. The next prime is 878632987. The reversal of 878632985 is 589236878.

878632985 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589236878 = 2 ⋅294618439.

It can be written as a sum of positive squares in 2 ways, for example, as 689955289 + 188677696 = 26267^2 + 13736^2 .

It is a cyclic number.

It is not a de Polignac number, because 878632985 - 2⁶ = 878632921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878632985.

It is not an unprimeable number, because it can be changed into a prime (878632987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87863294 + ... + 87863303.

It is an arithmetic number, because the mean of its divisors is an integer number (263589897).

Almost surely, 2^878632985 is an apocalyptic number.

It is an amenable number.

878632985 is a deficient number, since it is larger than the sum of its proper divisors (175726603).

878632985 is a wasteful number, since it uses less digits than its factorization.

878632985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175726602.

The product of its digits is 5806080, while the sum is 56.

The square root of 878632985 is about 29641.7439601654. The cubic root of 878632985 is about 957.7875064608.

The spelling of 878632985 in words is "eight hundred seventy-eight million, six hundred thirty-two thousand, nine hundred eighty-five".