47091638 has 16 divisors (see below), whose sum is σ = 77510736. Its totient is φ = 21279840.

The previous prime is 47091631. The next prime is 47091659. The reversal of 47091638 is 83619074.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47091631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381 + ... + 9992.

It is an arithmetic number, because the mean of its divisors is an integer number (4844421).

Almost surely, 2^47091638 is an apocalyptic number.

47091638 is a deficient number, since it is larger than the sum of its proper divisors (30419098).

47091638 is a wasteful number, since it uses less digits than its factorization.

47091638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 47091638 is about 6862.3347338934. The cubic root of 47091638 is about 361.1169987276.

The spelling of 47091638 in words is "forty-seven million, ninety-one thousand, six hundred thirty-eight".