81078 has 8 divisors (see below), whose sum is σ = 162168. Its totient is φ = 27024.

The previous prime is 81077. The next prime is 81083. The reversal of 81078 is 87018.

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

81078 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81071) 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, 6751 + ... + 6762.

It is an arithmetic number, because the mean of its divisors is an integer number (20271).

2⁸¹⁰⁷⁸ is an apocalyptic number.

81078 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 (81084).

81078 is a wasteful number, since it uses less digits than its factorization.

81078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13518.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 81078 is about 284.7419884738. The cubic root of 81078 is about 43.2813709828.

It can be divided in two parts, 810 and 78, that added together give a palindrome (888).

The spelling of 81078 in words is "eighty-one thousand, seventy-eight".