199918480 has 20 divisors (see below), whose sum is σ = 464810652. Its totient is φ = 79967360.

The previous prime is 199918469. The next prime is 199918519. The reversal of 199918480 is 84819991.

It can be written as a sum of positive squares in 2 ways, for example, as 79709184 + 120209296 = 8928^2 + 10964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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, 1249411 + ... + 1249570.

Almost surely, 2^199918480 is an apocalyptic number.

199918480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199918480 is an abundant number, since it is smaller than the sum of its proper divisors (264892172).

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

199918480 is a wasteful number, since it uses less digits than its factorization.

199918480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498994 (or 2498988 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 199918480 is about 14139.2531627381. The cubic root of 199918480 is about 584.7240815361.

The spelling of 199918480 in words is "one hundred ninety-nine million, nine hundred eighteen thousand, four hundred eighty".