47790138 has 16 divisors (see below), whose sum is σ = 104269536. Its totient is φ = 14481840.

The previous prime is 47790109. The next prime is 47790139. The reversal of 47790138 is 83109774.

47790138 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 = 47790096 and 47790105.

It is not an unprimeable number, because it can be changed into a prime (47790139) 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, 361981 + ... + 362112.

It is an arithmetic number, because the mean of its divisors is an integer number (6516846).

Almost surely, 2^47790138 is an apocalyptic number.

47790138 is an abundant number, since it is smaller than the sum of its proper divisors (56479398).

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

47790138 is a wasteful number, since it uses less digits than its factorization.

47790138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724109.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 47790138 is about 6913.0411542244. The cubic root of 47790138 is about 362.8936995695.

The spelling of 47790138 in words is "forty-seven million, seven hundred ninety thousand, one hundred thirty-eight".