198446840 has 32 divisors (see below), whose sum is σ = 454934880. Its totient is φ = 77880192.

The previous prime is 198446839. The next prime is 198446851. The reversal of 198446840 is 48644891.

It is a super-2 number, since 2×198446840² = 78762296611971200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 198446791 and 198446800.

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, 44684 + ... + 48923.

It is an arithmetic number, because the mean of its divisors is an integer number (14216715).

Almost surely, 2^198446840 is an apocalyptic number.

198446840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198446840 is an abundant number, since it is smaller than the sum of its proper divisors (256488040).

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

198446840 is a wasteful number, since it uses less digits than its factorization.

198446840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93671 (or 93667 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 198446840 is about 14087.1160994719. The cubic root of 198446840 is about 583.2857895038.

The spelling of 198446840 in words is "one hundred ninety-eight million, four hundred forty-six thousand, eight hundred forty".