199238424 has 128 divisors (see below), whose sum is σ = 626503680. Its totient is φ = 51292800.

The previous prime is 199238407. The next prime is 199238437. The reversal of 199238424 is 424832991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241677 + ... + 242499.

It is an arithmetic number, because the mean of its divisors is an integer number (4894560).

Almost surely, 2^199238424 is an apocalyptic number.

199238424 is a gapful number since it is divisible by the number (14) 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 199238424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313251840).

199238424 is an abundant number, since it is smaller than the sum of its proper divisors (427265256).

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

199238424 is a wasteful number, since it uses less digits than its factorization.

199238424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 977 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 199238424 is about 14115.1841645796. The cubic root of 199238424 is about 584.0603162197.

The spelling of 199238424 in words is "one hundred ninety-nine million, two hundred thirty-eight thousand, four hundred twenty-four".