673878 has 16 divisors (see below), whose sum is σ = 1391616. Its totient is φ = 217320.

The previous prime is 673837. The next prime is 673879. The reversal of 673878 is 878376.

It is a super-2 number, since 2×673878² = 908223117768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673879) by changing a digit.

673878 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 7 ways as a sum of consecutive naturals, for example, 1626 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (86976).

2⁶⁷³⁸⁷⁸ is an apocalyptic number.

673878 is an abundant number, since it is smaller than the sum of its proper divisors (717738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673878 is a wasteful number, since it uses less digits than its factorization.

673878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its digits is 56448, while the sum is 39.

The square root of 673878 is about 820.9007248139. The cubic root of 673878 is about 87.6719015188.

It can be divided in two parts, 673 and 878, that added together give a palindrome (1551).

The spelling of 673878 in words is "six hundred seventy-three thousand, eight hundred seventy-eight".