47720178 has 80 divisors (see below), whose sum is σ = 118831680. Its totient is φ = 14191200.

The previous prime is 47720171. The next prime is 47720219. The reversal of 47720178 is 87102774.

47720178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47720171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 108483 + ... + 108921.

It is an arithmetic number, because the mean of its divisors is an integer number (1485396).

Almost surely, 2^47720178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47720178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59415840).

47720178 is an abundant number, since it is smaller than the sum of its proper divisors (71111502).

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

47720178 is a wasteful number, since it uses less digits than its factorization.

47720178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 47720178 is about 6907.9792993320. The cubic root of 47720178 is about 362.7165330181.

The spelling of 47720178 in words is "forty-seven million, seven hundred twenty thousand, one hundred seventy-eight".