220688064 has 70 divisors (see below), whose sum is σ = 654203924. Its totient is φ = 73560960.

The previous prime is 220688029. The next prime is 220688081. The reversal of 220688064 is 460886022.

220688064 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16102 + ... + 26469.

Almost surely, 2^220688064 is an apocalyptic number.

220688064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220688064 is an abundant number, since it is smaller than the sum of its proper divisors (433515860).

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

220688064 is an equidigital number, since it uses as much as digits as its factorization.

220688064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42595 (or 42576 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 220688064 is about 14855.5734995321. The cubic root of 220688064 is about 604.3097690310.

The spelling of 220688064 in words is "two hundred twenty million, six hundred eighty-eight thousand, sixty-four".