1858223 has 4 divisors (see below), whose sum is σ = 1876368. Its totient is φ = 1840080.

The previous prime is 1858217. The next prime is 1858249. The reversal of 1858223 is 3228581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1858223 - 2⁸ = 1857967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8918 + ... + 9123.

It is an arithmetic number, because the mean of its divisors is an integer number (469092).

2^1858223 is an apocalyptic number.

1858223 is a deficient number, since it is larger than the sum of its proper divisors (18145).

1858223 is a wasteful number, since it uses less digits than its factorization.

1858223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18144.

The product of its digits is 3840, while the sum is 29.

The square root of 1858223 is about 1363.1665342136. The cubic root of 1858223 is about 122.9417178217.

The spelling of 1858223 in words is "one million, eight hundred fifty-eight thousand, two hundred twenty-three".