47971770 has 128 divisors (see below), whose sum is σ = 151234560. Its totient is φ = 9434880.

The previous prime is 47971753. The next prime is 47971793. The reversal of 47971770 is 7717974.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43344 + ... + 44436.

It is an arithmetic number, because the mean of its divisors is an integer number (1181520).

Almost surely, 2^47971770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47971770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75617280).

47971770 is an abundant number, since it is smaller than the sum of its proper divisors (103262790).

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

47971770 is a wasteful number, since it uses less digits than its factorization.

47971770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 86436, while the sum is 42.

The square root of 47971770 is about 6926.1656058746. The cubic root of 47971770 is about 363.3528583247.

The spelling of 47971770 in words is "forty-seven million, nine hundred seventy-one thousand, seven hundred seventy".