199724772 has 96 divisors (see below), whose sum is σ = 536481792. Its totient is φ = 57286656.

The previous prime is 199724753. The next prime is 199724839. The reversal of 199724772 is 277427991.

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 31 ways as a sum of consecutive naturals, for example, 336508 + ... + 337100.

It is an arithmetic number, because the mean of its divisors is an integer number (5588352).

Almost surely, 2^199724772 is an apocalyptic number.

199724772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199724772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268240896).

199724772 is an abundant number, since it is smaller than the sum of its proper divisors (336757020).

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

199724772 is a wasteful number, since it uses less digits than its factorization.

199724772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 755 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 199724772 is about 14132.4014944382. The cubic root of 199724772 is about 584.5351673106.

The spelling of 199724772 in words is "one hundred ninety-nine million, seven hundred twenty-four thousand, seven hundred seventy-two".