1608865280 has 320 divisors, whose sum is σ = 4619704320. Its totient is φ = 530841600.

The previous prime is 1608865231. The next prime is 1608865303. The reversal of 1608865280 is 825688061.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16586192 + ... + 16586288.

It is an arithmetic number, because the mean of its divisors is an integer number (14436576).

Almost surely, 2^1608865280 is an apocalyptic number.

1608865280 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 1608865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309852160).

1608865280 is an abundant number, since it is smaller than the sum of its proper divisors (3010839040).

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

1608865280 is a wasteful number, since it uses less digits than its factorization.

1608865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 1608865280 is about 40110.6629214726. The cubic root of 1608865280 is about 1171.7633041323.

The spelling of 1608865280 in words is "one billion, six hundred eight million, eight hundred sixty-five thousand, two hundred eighty".