• 718 can be written using four 4's:
718 has 4 divisors (see below), whose sum is σ = 1080. Its totient is φ = 358.
The previous prime is 709. The next prime is 719. The reversal of 718 is 817.
718 is nontrivially palindromic in base 4.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817 = 19 ⋅43.
It is a plaindrome in base 16.
It is a nialpdrome in base 9 and base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (719) by changing a digit.
718 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178 + ... + 181.
It is an arithmetic number, because the mean of its divisors is an integer number (270).
2718 is an apocalyptic number.
718 is a deficient number, since it is larger than the sum of its proper divisors (362).
718 is a wasteful number, since it uses less digits than its factorization.
718 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 361.
The product of its digits is 56, while the sum is 16.
The square root of 718 is about 26.7955220139. The cubic root of 718 is about 8.9545028994.
Subtracting 718 from its reverse (817), we obtain a palindrome (99).
It can be divided in two parts, 7 and 18, that added together give a square (25 = 52).
The spelling of 718 in words is "seven hundred eighteen", and thus it is an aban number and an oban number.
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