102818 has 8 divisors (see below), whose sum is σ = 156060. Its totient is φ = 50800.

The previous prime is 102811. The next prime is 102829. The reversal of 102818 is 818201.

102818 = 87² + 88² + ... + 98².

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 20449 = 287^2 + 143^2 .

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

It is a super-2 number, since 2×102818² = 21143082248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102818.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102818.

It is not an unprimeable number, because it can be changed into a prime (102811) by changing a digit.

102818 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 456.

2¹⁰²⁸¹⁸ is an apocalyptic number.

102818 is a deficient number, since it is larger than the sum of its proper divisors (53242).

102818 is a wasteful number, since it uses less digits than its factorization.

102818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 102818 is about 320.6524598378. The cubic root of 102818 is about 46.8478556918.

It can be divided in two parts, 102 and 818, that multiplied together give a triangular number (83436 = T₄₀₈).

The spelling of 102818 in words is "one hundred two thousand, eight hundred eighteen".