1985826938 has 8 divisors (see below), whose sum is σ = 2980214580. Its totient is φ = 992422080.

The previous prime is 1985826929. The next prime is 1985826961. The reversal of 1985826938 is 8396285891.

It can be written as a sum of positive squares in 2 ways, for example, as 1512198769 + 473628169 = 38887^2 + 21763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 240623 + ... + 248738.

Almost surely, 2^1985826938 is an apocalyptic number.

1985826938 is a deficient number, since it is larger than the sum of its proper divisors (994387642).

1985826938 is a wasteful number, since it uses less digits than its factorization.

1985826938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491392.

The product of its digits is 7464960, while the sum is 59.

The square root of 1985826938 is about 44562.6181681463. The cubic root of 1985826938 is about 1256.9378353514.

The spelling of 1985826938 in words is "one billion, nine hundred eighty-five million, eight hundred twenty-six thousand, nine hundred thirty-eight".