1986495398 has 16 divisors (see below), whose sum is σ = 3018773184. Its totient is φ = 980294400.

The previous prime is 1986495361. The next prime is 1986495431. The reversal of 1986495398 is 8935946891.

It is a self number, because there is not a number n which added to its sum of digits gives 1986495398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57248 + ... + 85148.

It is an arithmetic number, because the mean of its divisors is an integer number (188673324).

Almost surely, 2^1986495398 is an apocalyptic number.

1986495398 is a deficient number, since it is larger than the sum of its proper divisors (1032277786).

1986495398 is a wasteful number, since it uses less digits than its factorization.

1986495398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28367.

The product of its digits is 16796160, while the sum is 62.

The square root of 1986495398 is about 44570.1177696447. The cubic root of 1986495398 is about 1257.0788544219.

The spelling of 1986495398 in words is "one billion, nine hundred eighty-six million, four hundred ninety-five thousand, three hundred ninety-eight".