878497809 has 32 divisors (see below), whose sum is σ = 1385988096. Its totient is φ = 484349760.

The previous prime is 878497801. The next prime is 878497847. The reversal of 878497809 is 908794878.

It is not a de Polignac number, because 878497809 - 2³ = 878497801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (878497801) 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, 237079 + ... + 240755.

It is an arithmetic number, because the mean of its divisors is an integer number (43312128).

Almost surely, 2^878497809 is an apocalyptic number.

It is an amenable number.

878497809 is a deficient number, since it is larger than the sum of its proper divisors (507490287).

878497809 is a wasteful number, since it uses less digits than its factorization.

878497809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085.

The product of its (nonzero) digits is 8128512, while the sum is 60.

The square root of 878497809 is about 29639.4637097232. The cubic root of 878497809 is about 957.7383860179.

The spelling of 878497809 in words is "eight hundred seventy-eight million, four hundred ninety-seven thousand, eight hundred nine".