47447284 has 12 divisors (see below), whose sum is σ = 83562724. Its totient is φ = 23572224.

The previous prime is 47447263. The next prime is 47447293. The reversal of 47447284 is 48274474.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31606884 + 15840400 = 5622^2 + 3980^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37149 + ... + 38404.

Almost surely, 2^47447284 is an apocalyptic number.

It is an amenable number.

47447284 is a deficient number, since it is larger than the sum of its proper divisors (36115440).

47447284 is a wasteful number, since it uses less digits than its factorization.

47447284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75714 (or 75712 counting only the distinct ones).

The product of its digits is 200704, while the sum is 40.

The square root of 47447284 is about 6888.1988937603. The cubic root of 47447284 is about 362.0237970579.

The spelling of 47447284 in words is "forty-seven million, four hundred forty-seven thousand, two hundred eighty-four".