198906038 has 4 divisors (see below), whose sum is σ = 298359060. Its totient is φ = 99453018.

The previous prime is 198906031. The next prime is 198906061. The reversal of 198906038 is 830609891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830609891 = 5779 ⋅143729.

It is a super-2 number, since 2×198906038² = 79127223905714888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198906038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198906031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49726508 + ... + 49726511.

It is an arithmetic number, because the mean of its divisors is an integer number (74589765).

Almost surely, 2^198906038 is an apocalyptic number.

198906038 is a deficient number, since it is larger than the sum of its proper divisors (99453022).

198906038 is an equidigital number, since it uses as much as digits as its factorization.

198906038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99453021.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 198906038 is about 14103.4051916550. The cubic root of 198906038 is about 583.7353428787.

The spelling of 198906038 in words is "one hundred ninety-eight million, nine hundred six thousand, thirty-eight".