1798355520 has 392 divisors, whose sum is σ = 6926113656. Its totient is φ = 441925632.

The previous prime is 1798355519. The next prime is 1798355543. The reversal of 1798355520 is 255538971.

1798355520 is a `hidden beast` number, since 1 + 7 + 98 + 3 + 5 + 552 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60466176 + 1737889344 = 7776^2 + 41688^2 .

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

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 55 ways as a sum of consecutive naturals, for example, 3032344 + ... + 3032936.

Almost surely, 2^1798355520 is an apocalyptic number.

1798355520 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 1798355520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3463056828).

1798355520 is an abundant number, since it is smaller than the sum of its proper divisors (5127758136).

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

1798355520 is an equidigital number, since it uses as much as digits as its factorization.

1798355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 1798355520 is about 42407.0220600315. The cubic root of 1798355520 is about 1216.0698395945.

The spelling of 1798355520 in words is "one billion, seven hundred ninety-eight million, three hundred fifty-five thousand, five hundred twenty".