47998 has 8 divisors (see below), whose sum is σ = 73008. Its totient is φ = 23664.
The previous prime is 47981. The next prime is 48017. The reversal of 47998 is 89974.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an Ulam number.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 322.
It is an arithmetic number, because the mean of its divisors is an integer number (9126).
247998 is an apocalyptic number.
47998 is a deficient number, since it is larger than the sum of its proper divisors (25010).
47998 is a wasteful number, since it uses less digits than its factorization.
47998 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 338.
The product of its digits is 18144, while the sum is 37.
The square root of 47998 is about 219.0844585999. The cubic root of 47998 is about 36.3419070939.
Subtracting from 47998 its sum of digits (37), we obtain a square (47961 = 2192).
The spelling of 47998 in words is "forty-seven thousand, nine hundred ninety-eight".
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