199578132 has 72 divisors (see below), whose sum is σ = 545781600. Its totient is φ = 61128000.

The previous prime is 199578073. The next prime is 199578133. The reversal of 199578132 is 231875991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199578133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116619 + ... + 118317.

It is an arithmetic number, because the mean of its divisors is an integer number (7580300).

Almost surely, 2^199578132 is an apocalyptic number.

199578132 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 199578132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272890800).

199578132 is an abundant number, since it is smaller than the sum of its proper divisors (346203468).

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

199578132 is a wasteful number, since it uses less digits than its factorization.

199578132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1968 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 199578132 is about 14127.2124638939. The cubic root of 199578132 is about 584.3920750232.

The spelling of 199578132 in words is "one hundred ninety-nine million, five hundred seventy-eight thousand, one hundred thirty-two".