198049820 has 12 divisors (see below), whose sum is σ = 415904664. Its totient is φ = 79219920.

The previous prime is 198049807. The next prime is 198049823. The reversal of 198049820 is 28940891.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198049823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4951226 + ... + 4951265.

It is an arithmetic number, because the mean of its divisors is an integer number (34658722).

Almost surely, 2^198049820 is an apocalyptic number.

198049820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198049820 is an abundant number, since it is smaller than the sum of its proper divisors (217854844).

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

198049820 is a wasteful number, since it uses less digits than its factorization.

198049820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9902500 (or 9902498 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 198049820 is about 14073.0174447416. The cubic root of 198049820 is about 582.8965488567.

The spelling of 198049820 in words is "one hundred ninety-eight million, forty-nine thousand, eight hundred twenty".