198947408 has 40 divisors (see below), whose sum is σ = 421312320. Its totient is φ = 90256640.

The previous prime is 198947393. The next prime is 198947459. The reversal of 198947408 is 804749891.

It is a super-2 number, since 2×198947408² = 79160142299836928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150173 + ... + 151491.

It is an arithmetic number, because the mean of its divisors is an integer number (10532808).

Almost surely, 2^198947408 is an apocalyptic number.

It is an amenable number.

198947408 is an abundant number, since it is smaller than the sum of its proper divisors (222364912).

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

198947408 is a wasteful number, since it uses less digits than its factorization.

198947408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 198947408 is about 14104.8717824729. The cubic root of 198947408 is about 583.7758099879.

The spelling of 198947408 in words is "one hundred ninety-eight million, nine hundred forty-seven thousand, four hundred eight".