47784243 has 18 divisors (see below), whose sum is σ = 69215724. Its totient is φ = 29309904.

The previous prime is 47784227. The next prime is 47784251. The reversal of 47784243 is 34248774.

It is not a de Polignac number, because 47784243 - 2⁴ = 47784227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (47784283) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 155496 + ... + 155802.

It is an arithmetic number, because the mean of its divisors is an integer number (3845318).

Almost surely, 2^47784243 is an apocalyptic number.

47784243 is a deficient number, since it is larger than the sum of its proper divisors (21431481).

47784243 is an equidigital number, since it uses as much as digits as its factorization.

47784243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 323 counting only the distinct ones).

The product of its digits is 150528, while the sum is 39.

The square root of 47784243 is about 6912.6147730074. The cubic root of 47784243 is about 362.8787777578.

Multiplying 47784243 by its product of digits (150528), we get a square (7192866530304 = 2681952²).

The spelling of 47784243 in words is "forty-seven million, seven hundred eighty-four thousand, two hundred forty-three".