673378 has 4 divisors (see below), whose sum is σ = 1010070. Its totient is φ = 336688.

The previous prime is 673349. The next prime is 673381. The reversal of 673378 is 873376.

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

It can be written as a sum of positive squares in only one way, i.e., 356409 + 316969 = 597^2 + 563^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168343 + ... + 168346.

2⁶⁷³³⁷⁸ is an apocalyptic number.

673378 is a deficient number, since it is larger than the sum of its proper divisors (336692).

673378 is a wasteful number, since it uses less digits than its factorization.

673378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336691.

The product of its digits is 21168, while the sum is 34.

The square root of 673378 is about 820.5961247776. The cubic root of 673378 is about 87.6502127280.

The spelling of 673378 in words is "six hundred seventy-three thousand, three hundred seventy-eight".