47238940 has 144 divisors (see below), whose sum is σ = 126403200. Its totient is φ = 14732928.

The previous prime is 47238931. The next prime is 47238967. The reversal of 47238940 is 4983274.

It is a happy number.

47238940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 47238940.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 800631 + ... + 800689.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^47238940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47238940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63201600).

47238940 is an abundant number, since it is smaller than the sum of its proper divisors (79164260).

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

47238940 is a wasteful number, since it uses less digits than its factorization.

47238940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 47238940 is about 6873.0589987283. The cubic root of 47238940 is about 361.4931298342.

The spelling of 47238940 in words is "forty-seven million, two hundred thirty-eight thousand, nine hundred forty".