47778472 has 16 divisors (see below), whose sum is σ = 102382560. Its totient is φ = 20476464.

The previous prime is 47778469. The next prime is 47778473. The reversal of 47778472 is 27487774.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (47778473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426538 + ... + 426649.

It is an arithmetic number, because the mean of its divisors is an integer number (6398910).

Almost surely, 2^47778472 is an apocalyptic number.

It is an amenable number.

47778472 is an abundant number, since it is smaller than the sum of its proper divisors (54604088).

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

47778472 is a wasteful number, since it uses less digits than its factorization.

47778472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853200 (or 853196 counting only the distinct ones).

The product of its digits is 614656, while the sum is 46.

The square root of 47778472 is about 6912.1973351460. The cubic root of 47778472 is about 362.8641686342.

The spelling of 47778472 in words is "forty-seven million, seven hundred seventy-eight thousand, four hundred seventy-two".