47890 has 8 divisors (see below), whose sum is σ = 86220. Its totient is φ = 19152.

The previous prime is 47881. The next prime is 47903. The reversal of 47890 is 9874.

47890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 5041 = 207^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

47890 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2385 + ... + 2404.

2⁴⁷⁸⁹⁰ is an apocalyptic number.

47890 is a deficient number, since it is larger than the sum of its proper divisors (38330).

47890 is a wasteful number, since it uses less digits than its factorization.

47890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 47890 is about 218.8378395068. The cubic root of 47890 is about 36.3146290582.

The spelling of 47890 in words is "forty-seven thousand, eight hundred ninety".