198409454 has 16 divisors (see below), whose sum is σ = 315649440. Its totient is φ = 93334560.

The previous prime is 198409447. The next prime is 198409459. The reversal of 198409454 is 454904891.

It is a super-2 number, since 2×198409454² = 78732622873156232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198409459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32549 + ... + 38160.

It is an arithmetic number, because the mean of its divisors is an integer number (19728090).

Almost surely, 2^198409454 is an apocalyptic number.

198409454 is a deficient number, since it is larger than the sum of its proper divisors (117239986).

198409454 is a wasteful number, since it uses less digits than its factorization.

198409454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70795.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 198409454 is about 14085.7890797782. The cubic root of 198409454 is about 583.2491582124.

The spelling of 198409454 in words is "one hundred ninety-eight million, four hundred nine thousand, four hundred fifty-four".