199609744 has 80 divisors (see below), whose sum is σ = 428544000. Its totient is φ = 89700480.

The previous prime is 199609723. The next prime is 199609757. The reversal of 199609744 is 447906991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555837 + ... + 556195.

It is an arithmetic number, because the mean of its divisors is an integer number (5356800).

Almost surely, 2^199609744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199609744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214272000).

199609744 is an abundant number, since it is smaller than the sum of its proper divisors (228934256).

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

199609744 is a wasteful number, since it uses less digits than its factorization.

199609744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 199609744 is about 14128.3312531948. The cubic root of 199609744 is about 584.4229281479.

The spelling of 199609744 in words is "one hundred ninety-nine million, six hundred nine thousand, seven hundred forty-four".