199420000 has 180 divisors, whose sum is σ = 540248940. Its totient is φ = 72384000.

The previous prime is 199419989. The next prime is 199420003. The reversal of 199420000 is 24991.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199420003) 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 29 ways as a sum of consecutive naturals, for example, 3379971 + ... + 3380029.

It is an arithmetic number, because the mean of its divisors is an integer number (3001383).

Almost surely, 2^199420000 is an apocalyptic number.

199420000 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 199420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270124470).

199420000 is an abundant number, since it is smaller than the sum of its proper divisors (340828940).

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

199420000 is an equidigital number, since it uses as much as digits as its factorization.

199420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 199420000 is about 14121.6146385603. The cubic root of 199420000 is about 584.2376901980.

Adding to 199420000 its reverse (24991), we get a palindrome (199444991).

The spelling of 199420000 in words is "one hundred ninety-nine million, four hundred twenty thousand".