47618220 has 96 divisors (see below), whose sum is σ = 147188160. Its totient is φ = 11427840.

The previous prime is 47618171. The next prime is 47618227. The reversal of 47618220 is 2281674.

47618220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (47618227) 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 31 ways as a sum of consecutive naturals, for example, 31236 + ... + 32724.

It is an arithmetic number, because the mean of its divisors is an integer number (1533210).

Almost surely, 2^47618220 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 47618220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73594080).

47618220 is an abundant number, since it is smaller than the sum of its proper divisors (99569940).

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

47618220 is a wasteful number, since it uses less digits than its factorization.

47618220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 47618220 is about 6900.5956264659. The cubic root of 47618220 is about 362.4580244698.

Adding to 47618220 its reverse (2281674), we get a palindrome (49899894).

The spelling of 47618220 in words is "forty-seven million, six hundred eighteen thousand, two hundred twenty".