47393780 has 72 divisors (see below), whose sum is σ = 116951688. Its totient is φ = 16084992.

The previous prime is 47393729. The next prime is 47393791. The reversal of 47393780 is 8739374.

It can be written as a sum of positive squares in 4 ways, for example, as 4648336 + 42745444 = 2156^2 + 6538^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134084 + ... + 134436.

It is an arithmetic number, because the mean of its divisors is an integer number (1624329).

Almost surely, 2^47393780 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 47393780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58475844).

47393780 is an abundant number, since it is smaller than the sum of its proper divisors (69557908).

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

47393780 is a wasteful number, since it uses less digits than its factorization.

47393780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 47393780 is about 6884.3140544284. The cubic root of 47393780 is about 361.8876669859.

The spelling of 47393780 in words is "forty-seven million, three hundred ninety-three thousand, seven hundred eighty".