673746638 has 16 divisors (see below), whose sum is σ = 1025453520. Its totient is φ = 331937856.

The previous prime is 673746581. The next prime is 673746679. The reversal of 673746638 is 836647376.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 237593 + ... + 240411.

It is an arithmetic number, because the mean of its divisors is an integer number (64090845).

Almost surely, 2^673746638 is an apocalyptic number.

673746638 is a deficient number, since it is larger than the sum of its proper divisors (351706882).

673746638 is a wasteful number, since it uses less digits than its factorization.

673746638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531.

The product of its digits is 3048192, while the sum is 50.

The square root of 673746638 is about 25956.6299430415. The cubic root of 673746638 is about 876.6620439227.

The spelling of 673746638 in words is "six hundred seventy-three million, seven hundred forty-six thousand, six hundred thirty-eight".