220228840 has 64 divisors (see below), whose sum is σ = 545045760. Its totient is φ = 79576320.

The previous prime is 220228831. The next prime is 220228859. The reversal of 220228840 is 48822022.

It is a junction number, because it is equal to n+sod(n) for n = 220228799 and 220228808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19935 + ... + 28945.

It is an arithmetic number, because the mean of its divisors is an integer number (8516340).

Almost surely, 2^220228840 is an apocalyptic number.

220228840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220228840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272522880).

220228840 is an abundant number, since it is smaller than the sum of its proper divisors (324816920).

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

220228840 is a wasteful number, since it uses less digits than its factorization.

220228840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082 (or 9078 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 220228840 is about 14840.1091640190. The cubic root of 220228840 is about 603.8903138395.

The spelling of 220228840 in words is "two hundred twenty million, two hundred twenty-eight thousand, eight hundred forty".