1017945220 has 12 divisors (see below), whose sum is σ = 2137685004. Its totient is φ = 407178080.

The previous prime is 1017945191. The next prime is 1017945241. The reversal of 1017945220 is 225497101.

It can be written as a sum of positive squares in 2 ways, for example, as 269485056 + 748460164 = 16416^2 + 27358^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25448611 + ... + 25448650.

It is an arithmetic number, because the mean of its divisors is an integer number (178140417).

Almost surely, 2^1017945220 is an apocalyptic number.

1017945220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1017945220 is an abundant number, since it is smaller than the sum of its proper divisors (1119739784).

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

1017945220 is a wasteful number, since it uses less digits than its factorization.

1017945220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50897270 (or 50897268 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1017945220 is about 31905.2537993353. The cubic root of 1017945220 is about 1005.9463112975.

The spelling of 1017945220 in words is "one billion, seventeen million, nine hundred forty-five thousand, two hundred twenty".