47448639 has 16 divisors (see below), whose sum is σ = 80336640. Its totient is φ = 27113400.

The previous prime is 47448559. The next prime is 47448647. The reversal of 47448639 is 93684474.

47448639 is a `hidden beast` number, since 4 + 7 + 4 + 4 + 8 + 639 = 666.

It is not a de Polignac number, because 47448639 - 2²⁵ = 13894207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47448594 and 47448603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47448679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125337 + ... + 125714.

It is an arithmetic number, because the mean of its divisors is an integer number (5021040).

Almost surely, 2^47448639 is an apocalyptic number.

47448639 is a deficient number, since it is larger than the sum of its proper divisors (32888001).

47448639 is a wasteful number, since it uses less digits than its factorization.

47448639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251067 (or 251061 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 47448639 is about 6888.2972496837. The cubic root of 47448639 is about 362.0272432515.

The spelling of 47448639 in words is "forty-seven million, four hundred forty-eight thousand, six hundred thirty-nine".