1659479220 has 288 divisors, whose sum is σ = 5961795840. Its totient is φ = 365783040.

The previous prime is 1659479189. The next prime is 1659479257. The reversal of 1659479220 is 229749561.

It is a super-2 number, since 2×1659479220² = 5507742563223616800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5905480 + ... + 5905760.

It is an arithmetic number, because the mean of its divisors is an integer number (20700680).

Almost surely, 2^1659479220 is an apocalyptic number.

1659479220 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 1659479220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2980897920).

1659479220 is an abundant number, since it is smaller than the sum of its proper divisors (4302316620).

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

1659479220 is a wasteful number, since it uses less digits than its factorization.

1659479220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1659479220 is about 40736.7060524044. The cubic root of 1659479220 is about 1183.9243135893.

The spelling of 1659479220 in words is "one billion, six hundred fifty-nine million, four hundred seventy-nine thousand, two hundred twenty".