198516540 has 24 divisors (see below), whose sum is σ = 555846480. Its totient is φ = 52937728.

The previous prime is 198516523. The next prime is 198516551. The reversal of 198516540 is 45615891.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 1654245 + ... + 1654364.

It is an arithmetic number, because the mean of its divisors is an integer number (23160270).

Almost surely, 2^198516540 is an apocalyptic number.

198516540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198516540 is an abundant number, since it is smaller than the sum of its proper divisors (357329940).

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

198516540 is a wasteful number, since it uses less digits than its factorization.

198516540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308621 (or 3308619 counting only the distinct ones).

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

The square root of 198516540 is about 14089.5897740140. The cubic root of 198516540 is about 583.3540701925.

The spelling of 198516540 in words is "one hundred ninety-eight million, five hundred sixteen thousand, five hundred forty".