618998 has 8 divisors (see below), whose sum is σ = 936192. Its totient is φ = 306936.

The previous prime is 618997. The next prime is 619007. The reversal of 618998 is 899816.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965 + ... + 1472.

It is an arithmetic number, because the mean of its divisors is an integer number (117024).

2⁶¹⁸⁹⁹⁸ is an apocalyptic number.

618998 is a deficient number, since it is larger than the sum of its proper divisors (317194).

618998 is a wasteful number, since it uses less digits than its factorization.

618998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its digits is 31104, while the sum is 41.

The square root of 618998 is about 786.7642594831. The cubic root of 618998 is about 85.2242291880.

The spelling of 618998 in words is "six hundred eighteen thousand, nine hundred ninety-eight".