220487808 has 64 divisors (see below), whose sum is σ = 589233600. Its totient is φ = 73049088.

The previous prime is 220487801. The next prime is 220487809. The reversal of 220487808 is 808784022.

220487808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×220487808² = 97229746953289728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220487801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64773 + ... + 68091.

It is an arithmetic number, because the mean of its divisors is an integer number (9206775).

Almost surely, 2^220487808 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 220487808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294616800).

220487808 is an abundant number, since it is smaller than the sum of its proper divisors (368745792).

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

220487808 is a wasteful number, since it uses less digits than its factorization.

220487808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509 (or 3497 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 220487808 is about 14848.8318732485. The cubic root of 220487808 is about 604.1269268214.

The spelling of 220487808 in words is "two hundred twenty million, four hundred eighty-seven thousand, eight hundred eight".