1669798800 has 360 divisors, whose sum is σ = 6170542560. Its totient is φ = 433382400.

The previous prime is 1669798783. The next prime is 1669798843. The reversal of 1669798800 is 88979661.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3984991 + ... + 3985409.

It is an arithmetic number, because the mean of its divisors is an integer number (17140396).

Almost surely, 2^1669798800 is an apocalyptic number.

1669798800 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 1669798800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3085271280).

1669798800 is an abundant number, since it is smaller than the sum of its proper divisors (4500743760).

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

1669798800 is a wasteful number, since it uses less digits than its factorization.

1669798800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 1669798800 is about 40863.1716830693. The cubic root of 1669798800 is about 1186.3733476667.

The spelling of 1669798800 in words is "one billion, six hundred sixty-nine million, seven hundred ninety-eight thousand, eight hundred".