673491138 has 32 divisors (see below), whose sum is σ = 1437316800. Its totient is φ = 209765376.

The previous prime is 673491113. The next prime is 673491139. The reversal of 673491138 is 831194376.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 673491138.

It is not an unprimeable number, because it can be changed into a prime (673491139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32143 + ... + 48786.

It is an arithmetic number, because the mean of its divisors is an integer number (44916150).

Almost surely, 2^673491138 is an apocalyptic number.

673491138 is an abundant number, since it is smaller than the sum of its proper divisors (763825662).

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

673491138 is a wasteful number, since it uses less digits than its factorization.

673491138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81026.

The product of its digits is 108864, while the sum is 42.

The square root of 673491138 is about 25951.7078050752. The cubic root of 673491138 is about 876.5512132043.

The spelling of 673491138 in words is "six hundred seventy-three million, four hundred ninety-one thousand, one hundred thirty-eight".