618398 has 8 divisors (see below), whose sum is σ = 1011960. Its totient is φ = 281080.

The previous prime is 618377. The next prime is 618407. The reversal of 618398 is 893816.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

618398 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14033 + ... + 14076.

It is an arithmetic number, because the mean of its divisors is an integer number (126495).

2⁶¹⁸³⁹⁸ is an apocalyptic number.

618398 is a deficient number, since it is larger than the sum of its proper divisors (393562).

618398 is a wasteful number, since it uses less digits than its factorization.

618398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28122.

The product of its digits is 10368, while the sum is 35.

The square root of 618398 is about 786.3828584093. The cubic root of 618398 is about 85.1966840973.

The spelling of 618398 in words is "six hundred eighteen thousand, three hundred ninety-eight".