199327720 has 32 divisors (see below), whose sum is σ = 474870600. Its totient is φ = 75040768.

The previous prime is 199327697. The next prime is 199327721. The reversal of 199327720 is 27723991.

It can be written as a sum of positive squares in 4 ways, for example, as 192598884 + 6728836 = 13878^2 + 2594^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (199327721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145885 + ... + 147244.

Almost surely, 2^199327720 is an apocalyptic number.

199327720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199327720 is an abundant number, since it is smaller than the sum of its proper divisors (275542880).

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

199327720 is a wasteful number, since it uses less digits than its factorization.

199327720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293157 (or 293153 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 199327720 is about 14118.3469287307. The cubic root of 199327720 is about 584.1475591977.

The spelling of 199327720 in words is "one hundred ninety-nine million, three hundred twenty-seven thousand, seven hundred twenty".