47878 has 8 divisors (see below), whose sum is σ = 73872. Its totient is φ = 23256.
The previous prime is 47869. The next prime is 47881. The reversal of 47878 is 87874.
47878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
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 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, 250 + ... + 397.
It is an arithmetic number, because the mean of its divisors is an integer number (9234).
247878 is an apocalyptic number.
47878 is a deficient number, since it is larger than the sum of its proper divisors (25994).
47878 is a wasteful number, since it uses less digits than its factorization.
47878 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 686.
The product of its digits is 12544, while the sum is 34.
The square root of 47878 is about 218.8104202272. The cubic root of 47878 is about 36.3115956348.
The spelling of 47878 in words is "forty-seven thousand, eight hundred seventy-eight".
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