1985010992 has 20 divisors (see below), whose sum is σ = 3858334896. Its totient is φ = 989311680.

The previous prime is 1985010991. The next prime is 1985011009. The reversal of 1985010992 is 2990105891.

It is a happy number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1985010991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194483 + ... + 204434.

Almost surely, 2^1985010992 is an apocalyptic number.

It is an amenable number.

1985010992 is a deficient number, since it is larger than the sum of its proper divisors (1873323904).

1985010992 is a wasteful number, since it uses less digits than its factorization.

1985010992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399236 (or 399230 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 1985010992 is about 44553.4621774784. The cubic root of 1985010992 is about 1256.7656595727.

The spelling of 1985010992 in words is "one billion, nine hundred eighty-five million, ten thousand, nine hundred ninety-two".