47129418 has 64 divisors (see below), whose sum is σ = 122653440. Its totient is φ = 13132800.

The previous prime is 47129417. The next prime is 47129429. The reversal of 47129418 is 81492174.

47129418 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 (47129417) 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 31 ways as a sum of consecutive naturals, for example, 13978 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^47129418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47129418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61326720).

47129418 is an abundant number, since it is smaller than the sum of its proper divisors (75524022).

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

47129418 is a wasteful number, since it uses less digits than its factorization.

47129418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100 (or 3094 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 47129418 is about 6865.0868894720. The cubic root of 47129418 is about 361.2135434928.

The spelling of 47129418 in words is "forty-seven million, one hundred twenty-nine thousand, four hundred eighteen".