40199980 has 12 divisors (see below), whose sum is σ = 84420000. Its totient is φ = 16079984.

The previous prime is 40199977. The next prime is 40199981. The reversal of 40199980 is 8999104.

40199980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (40199981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004980 + ... + 1005019.

It is an arithmetic number, because the mean of its divisors is an integer number (7035000).

Almost surely, 2^40199980 is an apocalyptic number.

It is an amenable number.

40199980 is an abundant number, since it is smaller than the sum of its proper divisors (44220020).

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

40199980 is a wasteful number, since it uses less digits than its factorization.

40199980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010008 (or 2010006 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 40199980 is about 6340.3454164580. The cubic root of 40199980 is about 342.5641771510.

The spelling of 40199980 in words is "forty million, one hundred ninety-nine thousand, nine hundred eighty".