878429 has 4 divisors (see below), whose sum is σ = 880476. Its totient is φ = 876384.

The previous prime is 878419. The next prime is 878443. The reversal of 878429 is 924878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 280900 + 597529 = 530^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 878429 - 2⁴ = 878413 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878392 and 878401.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878429.

It is not an unprimeable number, because it can be changed into a prime (878419) 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 3 ways as a sum of consecutive naturals, for example, 104 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (220119).

2⁸⁷⁸⁴²⁹ is an apocalyptic number.

It is an amenable number.

878429 is a deficient number, since it is larger than the sum of its proper divisors (2047).

878429 is a wasteful number, since it uses less digits than its factorization.

878429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its digits is 32256, while the sum is 38.

The square root of 878429 is about 937.2454321041. The cubic root of 878429 is about 95.7713380172.

The spelling of 878429 in words is "eight hundred seventy-eight thousand, four hundred twenty-nine".