198996820 has 24 divisors (see below), whose sum is σ = 455884128. Its totient is φ = 72362400.

The previous prime is 198996817. The next prime is 198996829. The reversal of 198996820 is 28699891.

It is a super-2 number, since 2×198996820² = 79199468740224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198996829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452046 + ... + 452485.

It is an arithmetic number, because the mean of its divisors is an integer number (18995172).

Almost surely, 2^198996820 is an apocalyptic number.

198996820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198996820 is an abundant number, since it is smaller than the sum of its proper divisors (256887308).

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

198996820 is a wasteful number, since it uses less digits than its factorization.

198996820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904551 (or 904549 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 198996820 is about 14106.6232671040. The cubic root of 198996820 is about 583.8241362313.

The spelling of 198996820 in words is "one hundred ninety-eight million, nine hundred ninety-six thousand, eight hundred twenty".