47308638 has 16 divisors (see below), whose sum is σ = 101895696. Its totient is φ = 14556480.

The previous prime is 47308627. The next prime is 47308669. The reversal of 47308638 is 83680374.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47308596 and 47308605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303183 + ... + 303338.

It is an arithmetic number, because the mean of its divisors is an integer number (6368481).

Almost surely, 2^47308638 is an apocalyptic number.

47308638 is an abundant number, since it is smaller than the sum of its proper divisors (54587058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47308638 is a wasteful number, since it uses less digits than its factorization.

47308638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606539.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 47308638 is about 6878.1275068146. The cubic root of 47308638 is about 361.6708290441.

The spelling of 47308638 in words is "forty-seven million, three hundred eight thousand, six hundred thirty-eight".