1066028220 has 144 divisors (see below), whose sum is σ = 3323672352. Its totient is φ = 276456960.

The previous prime is 1066028213. The next prime is 1066028239. The reversal of 1066028220 is 228206601.

It is a super-2 number, since 2×1066028220² = 2272832331672736800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1249314 + ... + 1250166.

It is an arithmetic number, because the mean of its divisors is an integer number (23081058).

Almost surely, 2^1066028220 is an apocalyptic number.

1066028220 is a gapful number since it is divisible by the number (10) 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 1066028220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661836176).

1066028220 is an abundant number, since it is smaller than the sum of its proper divisors (2257644132).

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

1066028220 is a wasteful number, since it uses less digits than its factorization.

1066028220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1066028220 is about 32650.0875955946. The cubic root of 1066028220 is about 1021.5420159634.

The spelling of 1066028220 in words is "one billion, sixty-six million, twenty-eight thousand, two hundred twenty".