47778 has 8 divisors (see below), whose sum is σ = 95568. Its totient is φ = 15924.

The previous prime is 47777. The next prime is 47779. The reversal of 47778 is 87774.

47778 is nontrivially palindromic in base 5.

47778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47777) and next prime (47779).

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

47778 is an admirable number.

It is a plaindrome in base 10 and base 14.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (47777) 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, 3976 + ... + 3987.

It is an arithmetic number, because the mean of its divisors is an integer number (11946).

2⁴⁷⁷⁷⁸ is an apocalyptic number.

47778 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 (47784).

47778 is a wasteful number, since it uses less digits than its factorization.

47778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its digits is 10976, while the sum is 33.

The square root of 47778 is about 218.5817924714. The cubic root of 47778 is about 36.2862973727.

It can be divided in two parts, 477 and 78, that added together give a palindrome (555).

The spelling of 47778 in words is "forty-seven thousand, seven hundred seventy-eight".