1806486338 has 4 divisors (see below), whose sum is σ = 2709729510. Its totient is φ = 903243168.

The previous prime is 1806486307. The next prime is 1806486347. The reversal of 1806486338 is 8336846081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8336846081 = 23689 ⋅351929.

It can be written as a sum of positive squares in only one way, i.e., 1581096169 + 225390169 = 39763^2 + 15013^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1806486292 and 1806486301.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451621583 + ... + 451621586.

Almost surely, 2^1806486338 is an apocalyptic number.

1806486338 is a deficient number, since it is larger than the sum of its proper divisors (903243172).

1806486338 is an equidigital number, since it uses as much as digits as its factorization.

1806486338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903243171.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 1806486338 is about 42502.7803561132. The cubic root of 1806486338 is about 1217.8998037370.

The spelling of 1806486338 in words is "one billion, eight hundred six million, four hundred eighty-six thousand, three hundred thirty-eight".