198271390 has 8 divisors (see below), whose sum is σ = 356888520. Its totient is φ = 79308552.

The previous prime is 198271387. The next prime is 198271393. The reversal of 198271390 is 93172891.

It is an interprime number because it is at equal distance from previous prime (198271387) and next prime (198271393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198271393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9913560 + ... + 9913579.

It is an arithmetic number, because the mean of its divisors is an integer number (44611065).

Almost surely, 2^198271390 is an apocalyptic number.

198271390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198271390 is a deficient number, since it is larger than the sum of its proper divisors (158617130).

198271390 is a wasteful number, since it uses less digits than its factorization.

198271390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19827146.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 198271390 is about 14080.8874010128. The cubic root of 198271390 is about 583.1138414127.

The spelling of 198271390 in words is "one hundred ninety-eight million, two hundred seventy-one thousand, three hundred ninety".