198038550 has 48 divisors (see below), whose sum is σ = 492325632. Its totient is φ = 52682400.

The previous prime is 198038549. The next prime is 198038557. The reversal of 198038550 is 55830891.

It is a super-2 number, since 2×198038550² = 78438534572205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198038499 and 198038508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198038557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71695 + ... + 74405.

It is an arithmetic number, because the mean of its divisors is an integer number (10256784).

Almost surely, 2^198038550 is an apocalyptic number.

198038550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198038550 is an abundant number, since it is smaller than the sum of its proper divisors (294287082).

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

198038550 is a wasteful number, since it uses less digits than its factorization.

198038550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 198038550 is about 14072.6170274047. The cubic root of 198038550 is about 582.8854920955.

The spelling of 198038550 in words is "one hundred ninety-eight million, thirty-eight thousand, five hundred fifty".