920878 has 8 divisors (see below), whose sum is σ = 1578672. Its totient is φ = 394656.

The previous prime is 920869. The next prime is 920891. The reversal of 920878 is 878029.

It is a happy number.

920878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

920878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32875 + ... + 32902.

It is an arithmetic number, because the mean of its divisors is an integer number (197334).

2⁹²⁰⁸⁷⁸ is an apocalyptic number.

920878 is a deficient number, since it is larger than the sum of its proper divisors (657794).

920878 is a wasteful number, since it uses less digits than its factorization.

920878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65786.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 920878 is about 959.6238846548. The cubic root of 920878 is about 97.2898123858.

Subtracting from 920878 its reverse (878029), we obtain a square (42849 = 207²).

The spelling of 920878 in words is "nine hundred twenty thousand, eight hundred seventy-eight".