199249660 has 24 divisors (see below), whose sum is σ = 418815936. Its totient is φ = 79625280.

The previous prime is 199249657. The next prime is 199249693. The reversal of 199249660 is 66942991.

It is a self number, because there is not a number n which added to its sum of digits gives 199249660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20574 + ... + 28666.

It is an arithmetic number, because the mean of its divisors is an integer number (17450664).

Almost surely, 2^199249660 is an apocalyptic number.

199249660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199249660 is an abundant number, since it is smaller than the sum of its proper divisors (219566276).

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

199249660 is a wasteful number, since it uses less digits than its factorization.

199249660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9333 (or 9331 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 199249660 is about 14115.5821700701. The cubic root of 199249660 is about 584.0712953241.

It can be divided in two parts, 19924 and 9660, that added together give a square (29584 = 172²).

The spelling of 199249660 in words is "one hundred ninety-nine million, two hundred forty-nine thousand, six hundred sixty".