1992978206 has 16 divisors (see below), whose sum is σ = 3008140800. Its totient is φ = 990280728.

The previous prime is 1992978161. The next prime is 1992978227. The reversal of 1992978206 is 6028792991.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272465 + ... + 279683.

It is an arithmetic number, because the mean of its divisors is an integer number (188008800).

Almost surely, 2^1992978206 is an apocalyptic number.

1992978206 is a deficient number, since it is larger than the sum of its proper divisors (1015162594).

1992978206 is a wasteful number, since it uses less digits than its factorization.

1992978206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8063.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 1992978206 is about 44642.7844785694. The cubic root of 1992978206 is about 1258.4448365889. Note that the first 3 decimals are identical.

The spelling of 1992978206 in words is "one billion, nine hundred ninety-two million, nine hundred seventy-eight thousand, two hundred six".