1800423 has 12 divisors (see below), whose sum is σ = 2614248. Its totient is φ = 1194000.

The previous prime is 1800413. The next prime is 1800431. The reversal of 1800423 is 3240081.

It is a happy number.

It is not a de Polignac number, because 1800423 - 2⁸ = 1800167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1800396 and 1800405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800413) 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, 1861 + ... + 2657.

It is an arithmetic number, because the mean of its divisors is an integer number (217854).

2^1800423 is an apocalyptic number.

1800423 is a deficient number, since it is larger than the sum of its proper divisors (813825).

1800423 is a wasteful number, since it uses less digits than its factorization.

1800423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1800423 is about 1341.7984200319. The cubic root of 1800423 is about 121.6535679483.

The spelling of 1800423 in words is "one million, eight hundred thousand, four hundred twenty-three".