499999980 has 48 divisors (see below), whose sum is σ = 1401120000. Its totient is φ = 133226688.

The previous prime is 499999931. The next prime is 499999993. The reversal of 499999980 is 89999994.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 97521 + ... + 102519.

It is an arithmetic number, because the mean of its divisors is an integer number (29190000).

Almost surely, 2^499999980 is an apocalyptic number.

It is an amenable number.

499999980 is an abundant number, since it is smaller than the sum of its proper divisors (901120020).

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

499999980 is a wasteful number, since it uses less digits than its factorization.

499999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678 (or 6676 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 66.

The square root of 499999980 is about 22360.6793277843. The cubic root of 499999980 is about 793.7005154014.

The spelling of 499999980 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty".