1798771968 has 432 divisors, whose sum is σ = 6375317760. Its totient is φ = 498548736.

The previous prime is 1798771943. The next prime is 1798771973. The reversal of 1798771968 is 8691778971.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15918280 + ... + 15918392.

It is an arithmetic number, because the mean of its divisors is an integer number (14757680).

Almost surely, 2^1798771968 is an apocalyptic number.

1798771968 is a gapful number since it is divisible by the number (18) 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 1798771968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3187658880).

1798771968 is an abundant number, since it is smaller than the sum of its proper divisors (4576545792).

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

1798771968 is a wasteful number, since it uses less digits than its factorization.

1798771968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 172 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 63.

The square root of 1798771968 is about 42411.9319060097. The cubic root of 1798771968 is about 1216.1637014144.

The spelling of 1798771968 in words is "one billion, seven hundred ninety-eight million, seven hundred seventy-one thousand, nine hundred sixty-eight".