47786778 has 72 divisors (see below), whose sum is σ = 117160992. Its totient is φ = 14043744.

The previous prime is 47786777. The next prime is 47786789. The reversal of 47786778 is 87768774.

It is a happy number.

47786778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (47786777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69625 + ... + 70307.

It is an arithmetic number, because the mean of its divisors is an integer number (1627236).

Almost surely, 2^47786778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47786778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58580496).

47786778 is an abundant number, since it is smaller than the sum of its proper divisors (69374214).

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

47786778 is a wasteful number, since it uses less digits than its factorization.

47786778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 724 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 54.

The square root of 47786778 is about 6912.7981310031. The cubic root of 47786778 is about 362.8851946669.

The spelling of 47786778 in words is "forty-seven million, seven hundred eighty-six thousand, seven hundred seventy-eight".