47428 has 12 divisors (see below), whose sum is σ = 84672. Its totient is φ = 23240.

The previous prime is 47419. The next prime is 47431. The reversal of 47428 is 82474.

It is a nialpdrome in base 16.

It is an unprimeable number.

47428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (7056).

2⁴⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

47428 is a deficient number, since it is larger than the sum of its proper divisors (37244).

47428 is a wasteful number, since it uses less digits than its factorization.

47428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 240 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 47428 is about 217.7797052069. The cubic root of 47428 is about 36.1974744634.

The spelling of 47428 in words is "forty-seven thousand, four hundred twenty-eight".