47318220 has 72 divisors (see below), whose sum is σ = 144362400. Its totient is φ = 12545280.

The previous prime is 47318213. The next prime is 47318221. The reversal of 47318220 is 2281374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47318221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35160 + ... + 36480.

Almost surely, 2^47318220 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 47318220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72181200).

47318220 is an abundant number, since it is smaller than the sum of its proper divisors (97044180).

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

47318220 is a wasteful number, since it uses less digits than its factorization.

47318220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 47318220 is about 6878.8240274047. The cubic root of 47318220 is about 361.6952452753.

Adding to 47318220 its reverse (2281374), we get a palindrome (49599594).

The spelling of 47318220 in words is "forty-seven million, three hundred eighteen thousand, two hundred twenty".