673209144 has 96 divisors (see below), whose sum is σ = 1951971840. Its totient is φ = 217144800.

The previous prime is 673209143. The next prime is 673209157. The reversal of 673209144 is 441902376.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 673209099 and 673209108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673209143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54679 + ... + 65849.

It is an arithmetic number, because the mean of its divisors is an integer number (20333040).

Almost surely, 2^673209144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673209144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975985920).

673209144 is an abundant number, since it is smaller than the sum of its proper divisors (1278762696).

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

673209144 is a wasteful number, since it uses less digits than its factorization.

673209144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11223 (or 11207 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 673209144 is about 25946.2741833967. The cubic root of 673209144 is about 876.4288573802.

The spelling of 673209144 in words is "six hundred seventy-three million, two hundred nine thousand, one hundred forty-four".