618958 has 4 divisors (see below), whose sum is σ = 928440. Its totient is φ = 309478.

The previous prime is 618941. The next prime is 618971. The reversal of 618958 is 859816.

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

It is a congruent number.

It is an unprimeable number.

618958 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 as a sum of consecutive naturals, namely, 154738 + ... + 154741.

It is an arithmetic number, because the mean of its divisors is an integer number (232110).

2⁶¹⁸⁹⁵⁸ is an apocalyptic number.

618958 is a deficient number, since it is larger than the sum of its proper divisors (309482).

618958 is a wasteful number, since it uses less digits than its factorization.

618958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309481.

The product of its digits is 17280, while the sum is 37.

The square root of 618958 is about 786.7388384972. The cubic root of 618958 is about 85.2223934025. Note that the first 3 decimals are identical.

The spelling of 618958 in words is "six hundred eighteen thousand, nine hundred fifty-eight".