47939688 has 80 divisors (see below), whose sum is σ = 135384480. Its totient is φ = 15848352.

The previous prime is 47939681. The next prime is 47939729. The reversal of 47939688 is 88693974.

47939688 is a `hidden beast` number, since 479 + 3 + 96 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (47939681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107995 + ... + 108437.

It is an arithmetic number, because the mean of its divisors is an integer number (1692306).

Almost surely, 2^47939688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47939688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67692240).

47939688 is an abundant number, since it is smaller than the sum of its proper divisors (87444792).

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

47939688 is a wasteful number, since it uses less digits than its factorization.

47939688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 615 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 47939688 is about 6923.8492184622. The cubic root of 47939688 is about 363.2718406345.

The spelling of 47939688 in words is "forty-seven million, nine hundred thirty-nine thousand, six hundred eighty-eight".