47447136 has 144 divisors (see below), whose sum is σ = 156029328. Its totient is φ = 13516800.

The previous prime is 47447129. The next prime is 47447149. The reversal of 47447136 is 63174474.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 47447136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53416 + ... + 54296.

It is an arithmetic number, because the mean of its divisors is an integer number (1083537).

Almost surely, 2^47447136 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 47447136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78014664).

47447136 is an abundant number, since it is smaller than the sum of its proper divisors (108582192).

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

47447136 is a wasteful number, since it uses less digits than its factorization.

47447136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925 (or 914 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 47447136 is about 6888.1881507404. The cubic root of 47447136 is about 362.0234206432.

The spelling of 47447136 in words is "forty-seven million, four hundred forty-seven thousand, one hundred thirty-six".