618434 has 8 divisors (see below), whose sum is σ = 931260. Its totient is φ = 308016.

The previous prime is 618421. The next prime is 618437. The reversal of 618434 is 434816.

It can be written as a sum of positive squares in 2 ways, for example, as 616225 + 2209 = 785^2 + 47^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×618434² = 764921224712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (618437) by changing a digit.

618434 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332 + ... + 1160.

2⁶¹⁸⁴³⁴ is an apocalyptic number.

618434 is a deficient number, since it is larger than the sum of its proper divisors (312826).

618434 is a wasteful number, since it uses less digits than its factorization.

618434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its digits is 2304, while the sum is 26.

The square root of 618434 is about 786.4057476901. The cubic root of 618434 is about 85.1983373051.

The spelling of 618434 in words is "six hundred eighteen thousand, four hundred thirty-four".