1798489490 has 32 divisors (see below), whose sum is σ = 3819101184. Its totient is φ = 596733120.

The previous prime is 1798489481. The next prime is 1798489501. The reversal of 1798489490 is 949848971.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412229 + ... + 416568.

It is an arithmetic number, because the mean of its divisors is an integer number (119346912).

Almost surely, 2^1798489490 is an apocalyptic number.

1798489490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1798489490 is an abundant number, since it is smaller than the sum of its proper divisors (2020611694).

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

1798489490 is a wasteful number, since it uses less digits than its factorization.

1798489490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828842.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The square root of 1798489490 is about 42408.6016039199. The cubic root of 1798489490 is about 1216.1000362249.

The spelling of 1798489490 in words is "one billion, seven hundred ninety-eight million, four hundred eighty-nine thousand, four hundred ninety".