199853640 has 192 divisors, whose sum is σ = 753442560. Its totient is φ = 44997120.

The previous prime is 199853627. The next prime is 199853651. The reversal of 199853640 is 46358991.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 178362 + ... + 179478.

It is an arithmetic number, because the mean of its divisors is an integer number (3924180).

Almost surely, 2^199853640 is an apocalyptic number.

199853640 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 199853640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376721280).

199853640 is an abundant number, since it is smaller than the sum of its proper divisors (553588920).

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

199853640 is a wasteful number, since it uses less digits than its factorization.

199853640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 199853640 is about 14136.9600692652. The cubic root of 199853640 is about 584.6608597519.

The spelling of 199853640 in words is "one hundred ninety-nine million, eight hundred fifty-three thousand, six hundred forty".