878787 has 48 divisors (see below), whose sum is σ = 1659840. Its totient is φ = 435456.

The previous prime is 878783. The next prime is 878789. The reversal of 878787 is 787878.

878787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

878787 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 878787 - 2² = 878783 is a prime.

It is an alternating number because its digits alternate between even and odd.

878787 is an undulating number in base 10.

878787 is a modest number, since divided by 8787 gives 87 as remainder.

878787 is a lucky number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878787.

It is not an unprimeable number, because it can be changed into a prime (878783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23733 + ... + 23769.

It is an arithmetic number, because the mean of its divisors is an integer number (34580).

2⁸⁷⁸⁷⁸⁷ is an apocalyptic number.

878787 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

878787 is a deficient number, since it is larger than the sum of its proper divisors (781053).

878787 is a wasteful number, since it uses less digits than its factorization.

878787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 89 counting only the distinct ones).

The product of its digits is 175616, while the sum is 45.

The square root of 878787 is about 937.4363978425. The cubic root of 878787 is about 95.7843466506.

Subtracting from 878787 its reverse (787878), we obtain a palindrome (90909).

The spelling of 878787 in words is "eight hundred seventy-eight thousand, seven hundred eighty-seven".