199446840 has 128 divisors (see below), whose sum is σ = 669772800. Its totient is φ = 52790400.

The previous prime is 199446829. The next prime is 199446847. The reversal of 199446840 is 48644991.

199446840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199446847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162469 + ... + 163691.

It is an arithmetic number, because the mean of its divisors is an integer number (5232600).

Almost surely, 2^199446840 is an apocalyptic number.

199446840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199446840 is the 8154-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199446840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334886400).

199446840 is an abundant number, since it is smaller than the sum of its proper divisors (470325960).

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

199446840 is a wasteful number, since it uses less digits than its factorization.

199446840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 199446840 is about 14122.5649228460. The cubic root of 199446840 is about 584.2638999331.

The spelling of 199446840 in words is "one hundred ninety-nine million, four hundred forty-six thousand, eight hundred forty".