47931220 has 12 divisors (see below), whose sum is σ = 100655604. Its totient is φ = 19172480.

The previous prime is 47931209. The next prime is 47931223. The reversal of 47931220 is 2213974.

It can be written as a sum of positive squares in 2 ways, for example, as 10329796 + 37601424 = 3214^2 + 6132^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47931223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198261 + ... + 1198300.

It is an arithmetic number, because the mean of its divisors is an integer number (8387967).

Almost surely, 2^47931220 is an apocalyptic number.

It is an amenable number.

47931220 is an abundant number, since it is smaller than the sum of its proper divisors (52724384).

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

47931220 is a wasteful number, since it uses less digits than its factorization.

47931220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396570 (or 2396568 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 47931220 is about 6923.2376818942. The cubic root of 47931220 is about 363.2504500970.

The spelling of 47931220 in words is "forty-seven million, nine hundred thirty-one thousand, two hundred twenty".