1838213 has 12 divisors (see below), whose sum is σ = 2031300. Its totient is φ = 1662336.

The previous prime is 1838209. The next prime is 1838233. The reversal of 1838213 is 3128381.

It can be written as a sum of positive squares in 6 ways, for example, as 543169 + 1295044 = 737^2 + 1138^2 .

It is not a de Polignac number, because 1838213 - 2² = 1838209 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12263 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (169275).

2^1838213 is an apocalyptic number.

1838213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1838213 is a deficient number, since it is larger than the sum of its proper divisors (193087).

1838213 is a wasteful number, since it uses less digits than its factorization.

1838213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 235 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1838213 is about 1355.8071396773. The cubic root of 1838213 is about 122.4988310315.

The spelling of 1838213 in words is "one million, eight hundred thirty-eight thousand, two hundred thirteen".