47971660 has 72 divisors (see below), whose sum is σ = 113552208. Its totient is φ = 17001600.

The previous prime is 47971657. The next prime is 47971673. The reversal of 47971660 is 6617974.

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 23 ways as a sum of consecutive naturals, for example, 103830 + ... + 104290.

It is an arithmetic number, because the mean of its divisors is an integer number (1577114).

Almost surely, 2^47971660 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 47971660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56776104).

47971660 is an abundant number, since it is smaller than the sum of its proper divisors (65580548).

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

47971660 is a wasteful number, since it uses less digits than its factorization.

47971660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 47971660 is about 6926.1576649684. The cubic root of 47971660 is about 363.3525806000.

The spelling of 47971660 in words is "forty-seven million, nine hundred seventy-one thousand, six hundred sixty".