199660450 has 24 divisors (see below), whose sum is σ = 405130320. Its totient is φ = 72603600.

The previous prime is 199660441. The next prime is 199660471. The reversal of 199660450 is 54066991.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180960 + ... + 182059.

It is an arithmetic number, because the mean of its divisors is an integer number (16880430).

Almost surely, 2^199660450 is an apocalyptic number.

199660450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199660450 is an abundant number, since it is smaller than the sum of its proper divisors (205469870).

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

199660450 is a wasteful number, since it uses less digits than its factorization.

199660450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363042 (or 363037 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 199660450 is about 14130.1256186914. The cubic root of 199660450 is about 584.4724101012.

The spelling of 199660450 in words is "one hundred ninety-nine million, six hundred sixty thousand, four hundred fifty".