673030640 has 20 divisors (see below), whose sum is σ = 1564796424. Its totient is φ = 269212224.

The previous prime is 673030639. The next prime is 673030643. The reversal of 673030640 is 46030376.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673030643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4206362 + ... + 4206521.

Almost surely, 2^673030640 is an apocalyptic number.

It is an amenable number.

673030640 is an abundant number, since it is smaller than the sum of its proper divisors (891765784).

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

673030640 is a wasteful number, since it uses less digits than its factorization.

673030640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8412896 (or 8412890 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 673030640 is about 25942.8340780262. The cubic root of 673030640 is about 876.3513877025.

The spelling of 673030640 in words is "six hundred seventy-three million, thirty thousand, six hundred forty".