1798387938 has 24 divisors (see below), whose sum is σ = 3919037148. Its totient is φ = 595996512.

The previous prime is 1798387901. The next prime is 1798387949. The reversal of 1798387938 is 8397838971.

It can be written as a sum of positive squares in 2 ways, for example, as 1794115449 + 4272489 = 42357^2 + 2067^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285645 + ... + 291872.

Almost surely, 2^1798387938 is an apocalyptic number.

1798387938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1798387938 is an abundant number, since it is smaller than the sum of its proper divisors (2120649210).

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

1798387938 is a wasteful number, since it uses less digits than its factorization.

1798387938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577698 (or 577695 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 1798387938 is about 42407.4042827429. The cubic root of 1798387938 is about 1216.0771466990.

The spelling of 1798387938 in words is "one billion, seven hundred ninety-eight million, three hundred eighty-seven thousand, nine hundred thirty-eight".