47638887 has 4 divisors (see below), whose sum is σ = 63518520. Its totient is φ = 31759256.

The previous prime is 47638867. The next prime is 47638889. The reversal of 47638887 is 78883674.

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

It is a cyclic number.

It is not a de Polignac number, because 47638887 - 2⁶ = 47638823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47638889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7939812 + ... + 7939817.

It is an arithmetic number, because the mean of its divisors is an integer number (15879630).

Almost surely, 2^47638887 is an apocalyptic number.

47638887 is a deficient number, since it is larger than the sum of its proper divisors (15879633).

47638887 is a wasteful number, since it uses less digits than its factorization.

47638887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15879632.

The product of its digits is 1806336, while the sum is 51.

The square root of 47638887 is about 6902.0929434484. The cubic root of 47638887 is about 362.5104542368.

The spelling of 47638887 in words is "forty-seven million, six hundred thirty-eight thousand, eight hundred eighty-seven".