199229440 has 88 divisors (see below), whose sum is σ = 503316360. Its totient is φ = 75497472.

The previous prime is 199229419. The next prime is 199229441. The reversal of 199229440 is 44922991.

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

It is a junction number, because it is equal to n+sod(n) for n = 199229393 and 199229402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199229441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10485751 + ... + 10485769.

Almost surely, 2^199229440 is an apocalyptic number.

199229440 is a gapful number since it is divisible by the number (10) 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 199229440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251658180).

199229440 is an abundant number, since it is smaller than the sum of its proper divisors (304086920).

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

199229440 is an frugal number, since it uses more digits than its factorization.

199229440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 199229440 is about 14114.8659221404. The cubic root of 199229440 is about 584.0515373295.

The spelling of 199229440 in words is "one hundred ninety-nine million, two hundred twenty-nine thousand, four hundred forty".