198140390 has 16 divisors (see below), whose sum is σ = 407603232. Its totient is φ = 67933824.

The previous prime is 198140381. The next prime is 198140399. The reversal of 198140390 is 93041891.

It is an interprime number because it is at equal distance from previous prime (198140381) and next prime (198140399).

It is a super-3 number, since 3×198140390³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 198140390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198140399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1415219 + ... + 1415358.

It is an arithmetic number, because the mean of its divisors is an integer number (25475202).

Almost surely, 2^198140390 is an apocalyptic number.

198140390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198140390 is an abundant number, since it is smaller than the sum of its proper divisors (209462842).

198140390 is a wasteful number, since it uses less digits than its factorization.

198140390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830591.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 198140390 is about 14076.2349369425. The cubic root of 198140390 is about 582.9853899623.

The spelling of 198140390 in words is "one hundred ninety-eight million, one hundred forty thousand, three hundred ninety".