47809872 has 80 divisors (see below), whose sum is σ = 149722560. Its totient is φ = 14486400.

The previous prime is 47809841. The next prime is 47809873. The reversal of 47809872 is 27890874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47809873) 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 15 ways as a sum of consecutive naturals, for example, 279 + ... + 9782.

It is an arithmetic number, because the mean of its divisors is an integer number (1871532).

Almost surely, 2^47809872 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 47809872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74861280).

47809872 is an abundant number, since it is smaller than the sum of its proper divisors (101912688).

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

47809872 is a wasteful number, since it uses less digits than its factorization.

47809872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10089 (or 10077 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 47809872 is about 6914.4683092773. The cubic root of 47809872 is about 362.9436426407.

The spelling of 47809872 in words is "forty-seven million, eight hundred nine thousand, eight hundred seventy-two".