1838493 has 12 divisors (see below), whose sum is σ = 2727868. Its totient is φ = 1192320.

The previous prime is 1838461. The next prime is 1838519. The reversal of 1838493 is 3948381.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 710649 = 1062^2 + 843^2 .

It is not a de Polignac number, because 1838493 - 2⁵ = 1838461 is a prime.

It is a super-2 number, since 2×1838493² = 6760113022098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2428 + ... + 3093.

2^1838493 is an apocalyptic number.

It is an amenable number.

1838493 is a deficient number, since it is larger than the sum of its proper divisors (889375).

1838493 is a wasteful number, since it uses less digits than its factorization.

1838493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564 (or 5561 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1838493 is about 1355.9103952695. The cubic root of 1838493 is about 122.5050504651.

The spelling of 1838493 in words is "one million, eight hundred thirty-eight thousand, four hundred ninety-three".