47638 has 4 divisors (see below), whose sum is σ = 71460. Its totient is φ = 23818.

The previous prime is 47629. The next prime is 47639. The reversal of 47638 is 83674.

47638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

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

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11908 + ... + 11911.

It is an arithmetic number, because the mean of its divisors is an integer number (17865).

2⁴⁷⁶³⁸ is an apocalyptic number.

47638 is a deficient number, since it is larger than the sum of its proper divisors (23822).

47638 is a wasteful number, since it uses less digits than its factorization.

47638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821.

The product of its digits is 4032, while the sum is 28.

The square root of 47638 is about 218.2613112762. The cubic root of 47638 is about 36.2508204333.

The spelling of 47638 in words is "forty-seven thousand, six hundred thirty-eight".