47778135 has 16 divisors (see below), whose sum is σ = 77493984. Its totient is φ = 25132032.

The previous prime is 47778131. The next prime is 47778139. The reversal of 47778135 is 53187774.

It is a happy number.

47778135 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 (47778131) and next prime (47778139).

It is not a de Polignac number, because 47778135 - 2² = 47778131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47778131) 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 15 ways as a sum of consecutive naturals, for example, 20722 + ... + 22911.

It is an arithmetic number, because the mean of its divisors is an integer number (4843374).

Almost surely, 2^47778135 is an apocalyptic number.

47778135 is a deficient number, since it is larger than the sum of its proper divisors (29715849).

47778135 is a wasteful number, since it uses less digits than its factorization.

47778135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43714.

The product of its digits is 164640, while the sum is 42.

The square root of 47778135 is about 6912.1729579055. The cubic root of 47778135 is about 362.8633154919.

The spelling of 47778135 in words is "forty-seven million, seven hundred seventy-eight thousand, one hundred thirty-five".