47278438 has 16 divisors (see below), whose sum is σ = 72661536. Its totient is φ = 23063040.

The previous prime is 47278433. The next prime is 47278459. The reversal of 47278438 is 83487274.

47278438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 47278394 and 47278403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278433) 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 7 ways as a sum of consecutive naturals, for example, 19303 + ... + 21613.

It is an arithmetic number, because the mean of its divisors is an integer number (4541346).

Almost surely, 2^47278438 is an apocalyptic number.

47278438 is a deficient number, since it is larger than the sum of its proper divisors (25383098).

47278438 is a wasteful number, since it uses less digits than its factorization.

47278438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559.

The product of its digits is 301056, while the sum is 43.

The square root of 47278438 is about 6875.9317914011. The cubic root of 47278438 is about 361.5938537848.

The spelling of 47278438 in words is "forty-seven million, two hundred seventy-eight thousand, four hundred thirty-eight".