1818434 has 4 divisors (see below), whose sum is σ = 2727654. Its totient is φ = 909216.

The previous prime is 1818431. The next prime is 1818437. The reversal of 1818434 is 4348181.

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

It is an interprime number because it is at equal distance from previous prime (1818431) and next prime (1818437).

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 9409 = 1345^2 + 97^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1818397 and 1818406.

It is not an unprimeable number, because it can be changed into a prime (1818431) 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 as a sum of consecutive naturals, namely, 454607 + ... + 454610.

2^1818434 is an apocalyptic number.

1818434 is a deficient number, since it is larger than the sum of its proper divisors (909220).

1818434 is an equidigital number, since it uses as much as digits as its factorization.

1818434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909219.

The product of its digits is 3072, while the sum is 29.

The square root of 1818434 is about 1348.4932332051. The cubic root of 1818434 is about 122.0578870683.

The spelling of 1818434 in words is "one million, eight hundred eighteen thousand, four hundred thirty-four".