878090 has 16 divisors (see below), whose sum is σ = 1591272. Its totient is φ = 348864.

The previous prime is 878089. The next prime is 878099. The reversal of 878090 is 90878.

It can be written as a sum of positive squares in 4 ways, for example, as 326041 + 552049 = 571^2 + 743^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2612 + ... + 2928.

2⁸⁷⁸⁰⁹⁰ is an apocalyptic number.

878090 is a deficient number, since it is larger than the sum of its proper divisors (713182).

878090 is a wasteful number, since it uses less digits than its factorization.

878090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 878090 is about 937.0645655450. The cubic root of 878090 is about 95.7590165278.

The spelling of 878090 in words is "eight hundred seventy-eight thousand, ninety".