47791744 has 128 divisors (see below), whose sum is σ = 128177280. Its totient is φ = 17141760.

The previous prime is 47791741. The next prime is 47791759. The reversal of 47791744 is 44719774.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 47791744.

It is not an unprimeable number, because it can be changed into a prime (47791741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127942 + ... + 128314.

It is an arithmetic number, because the mean of its divisors is an integer number (1001385).

Almost surely, 2^47791744 is an apocalyptic number.

47791744 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47791744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64088640).

47791744 is an abundant number, since it is smaller than the sum of its proper divisors (80385536).

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

47791744 is a wasteful number, since it uses less digits than its factorization.

47791744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 406 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The square root of 47791744 is about 6913.1573105203. The cubic root of 47791744 is about 362.8977645697.

The spelling of 47791744 in words is "forty-seven million, seven hundred ninety-one thousand, seven hundred forty-four".