1659928220 has 12 divisors (see below), whose sum is σ = 3485849304. Its totient is φ = 663971280.

The previous prime is 1659928213. The next prime is 1659928223. The reversal of 1659928220 is 228299561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659928223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 41498186 + ... + 41498225.

It is an arithmetic number, because the mean of its divisors is an integer number (290487442).

Almost surely, 2^1659928220 is an apocalyptic number.

1659928220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1659928220 is an abundant number, since it is smaller than the sum of its proper divisors (1825921084).

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

1659928220 is a wasteful number, since it uses less digits than its factorization.

1659928220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82996420 (or 82996418 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1659928220 is about 40742.2166799991. The cubic root of 1659928220 is about 1184.0310808359.

The spelling of 1659928220 in words is "one billion, six hundred fifty-nine million, nine hundred twenty-eight thousand, two hundred twenty".