1798506540 has 144 divisors (see below), whose sum is σ = 5685039360. Its totient is φ = 459717120.

The previous prime is 1798506529. The next prime is 1798506547. The reversal of 1798506540 is 456058971.

1798506540 is a `hidden beast` number, since 1 + 7 + 98 + 506 + 54 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1798506547) by changing a digit.

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, 606742 + ... + 609698.

It is an arithmetic number, because the mean of its divisors is an integer number (39479440).

Almost surely, 2^1798506540 is an apocalyptic number.

1798506540 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 1798506540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2842519680).

1798506540 is an abundant number, since it is smaller than the sum of its proper divisors (3886532820).

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

1798506540 is a wasteful number, since it uses less digits than its factorization.

1798506540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112 (or 3107 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 1798506540 is about 42408.8026239836. The cubic root of 1798506540 is about 1216.1038791609.

The spelling of 1798506540 in words is "one billion, seven hundred ninety-eight million, five hundred six thousand, five hundred forty".