1731922138 has 16 divisors (see below), whose sum is σ = 2608973640. Its totient is φ = 862272576.

The previous prime is 1731922109. The next prime is 1731922147. The reversal of 1731922138 is 8312291371.

It can be written as a sum of positive squares in 4 ways, for example, as 1731142449 + 779689 = 41607^2 + 883^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1731922097 and 1731922106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568756 + ... + 571792.

Almost surely, 2^1731922138 is an apocalyptic number.

1731922138 is a deficient number, since it is larger than the sum of its proper divisors (877051502).

1731922138 is a wasteful number, since it uses less digits than its factorization.

1731922138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161.

The product of its digits is 18144, while the sum is 37.

The square root of 1731922138 is about 41616.3686306242. The cubic root of 1731922138 is about 1200.9072162742.

The spelling of 1731922138 in words is "one billion, seven hundred thirty-one million, nine hundred twenty-two thousand, one hundred thirty-eight".