806199972 has 12 divisors (see below), whose sum is σ = 1881133296. Its totient is φ = 268733320.

The previous prime is 806199949. The next prime is 806199997. The reversal of 806199972 is 279991608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33591654 + ... + 33591677.

It is an arithmetic number, because the mean of its divisors is an integer number (156761108).

Almost surely, 2^806199972 is an apocalyptic number.

It is an amenable number.

806199972 is an abundant number, since it is smaller than the sum of its proper divisors (1074933324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806199972 is a wasteful number, since it uses less digits than its factorization.

806199972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67183338 (or 67183336 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 806199972 is about 28393.6607713764. The cubic root of 806199972 is about 930.7097414836.

The spelling of 806199972 in words is "eight hundred six million, one hundred ninety-nine thousand, nine hundred seventy-two".