199135640 has 64 divisors (see below), whose sum is σ = 493737120. Its totient is φ = 71680000.

The previous prime is 199135627. The next prime is 199135687. The reversal of 199135640 is 46531991.

199135640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 199135594 and 199135603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42200 + ... + 46680.

Almost surely, 2^199135640 is an apocalyptic number.

199135640 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 199135640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246868560).

199135640 is an abundant number, since it is smaller than the sum of its proper divisors (294601480).

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

199135640 is a wasteful number, since it uses less digits than its factorization.

199135640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604 (or 4600 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 199135640 is about 14111.5427930471. The cubic root of 199135640 is about 583.9598630700.

The spelling of 199135640 in words is "one hundred ninety-nine million, one hundred thirty-five thousand, six hundred forty".