1798431 has 4 divisors (see below), whose sum is σ = 2397912. Its totient is φ = 1198952.

The previous prime is 1798429. The next prime is 1798441. The reversal of 1798431 is 1348971.

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 1798431 - 2¹ = 1798429 is a prime.

It is a super-2 number, since 2×1798431² = 6468708123522, which contains 22 as substring.

It is a D-number.

1798431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1798392 and 1798401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798421) 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, 299736 + ... + 299741.

It is an arithmetic number, because the mean of its divisors is an integer number (599478).

2^1798431 is an apocalyptic number.

1798431 is a deficient number, since it is larger than the sum of its proper divisors (599481).

1798431 is an equidigital number, since it uses as much as digits as its factorization.

1798431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599480.

The product of its digits is 6048, while the sum is 33.

The square root of 1798431 is about 1341.0559272454. The cubic root of 1798431 is about 121.6086852854.

The spelling of 1798431 in words is "one million, seven hundred ninety-eight thousand, four hundred thirty-one".