198240038 has 4 divisors (see below), whose sum is σ = 297360060. Its totient is φ = 99120018.

The previous prime is 198240037. The next prime is 198240047. The reversal of 198240038 is 830042891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830042891 = 1823 ⋅455317.

It is a super-2 number, since 2×198240038² = 78598225332482888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198240037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49560008 + ... + 49560011.

It is an arithmetic number, because the mean of its divisors is an integer number (74340015).

Almost surely, 2^198240038 is an apocalyptic number.

198240038 is a deficient number, since it is larger than the sum of its proper divisors (99120022).

198240038 is an equidigital number, since it uses as much as digits as its factorization.

198240038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99120021.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 198240038 is about 14079.7740748920. The cubic root of 198240038 is about 583.0831045039.

The spelling of 198240038 in words is "one hundred ninety-eight million, two hundred forty thousand, thirty-eight".