78618 has 8 divisors (see below), whose sum is σ = 157248. Its totient is φ = 26204.

The previous prime is 78607. The next prime is 78623. The reversal of 78618 is 81687.

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

78618 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6546 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2⁷⁸⁶¹⁸ is an apocalyptic number.

78618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624).

78618 is a wasteful number, since it uses less digits than its factorization.

78618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108.

The product of its digits is 2688, while the sum is 30.

The square root of 78618 is about 280.3890154767. The cubic root of 78618 is about 42.8391321146.

It can be divided in two parts, 78 and 618, that added together give a palindrome (696).

The spelling of 78618 in words is "seventy-eight thousand, six hundred eighteen".