1985280688 has 20 divisors (see below), whose sum is σ = 3850864888. Its totient is φ = 991509120.

The previous prime is 1985280677. The next prime is 1985280697. The reversal of 1985280688 is 8860825891.

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, 56133 + ... + 84388.

Almost surely, 2^1985280688 is an apocalyptic number.

It is an amenable number.

1985280688 is a deficient number, since it is larger than the sum of its proper divisors (1865584200).

1985280688 is a wasteful number, since it uses less digits than its factorization.

1985280688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141412 (or 141406 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 55.

The square root of 1985280688 is about 44556.4887305990. The cubic root of 1985280688 is about 1256.8225743411.

The spelling of 1985280688 in words is "one billion, nine hundred eighty-five million, two hundred eighty thousand, six hundred eighty-eight".