673940140 has 12 divisors (see below), whose sum is σ = 1415274336. Its totient is φ = 269576048.

The previous prime is 673940081. The next prime is 673940147. The reversal of 673940140 is 41049376.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 673940096 and 673940105.

It is not an unprimeable number, because it can be changed into a prime (673940147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16848484 + ... + 16848523.

It is an arithmetic number, because the mean of its divisors is an integer number (117939528).

Almost surely, 2^673940140 is an apocalyptic number.

It is an amenable number.

673940140 is an abundant number, since it is smaller than the sum of its proper divisors (741334196).

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

673940140 is a wasteful number, since it uses less digits than its factorization.

673940140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33697016 (or 33697014 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 673940140 is about 25960.3570853715. The cubic root of 673940140 is about 876.7459625215.

The spelling of 673940140 in words is "six hundred seventy-three million, nine hundred forty thousand, one hundred forty".