198622656 has 84 divisors (see below), whose sum is σ = 599313000. Its totient is φ = 62719488.

The previous prime is 198622643. The next prime is 198622657. The reversal of 198622656 is 656226891.

198622656 is a `hidden beast` number, since 19 + 8 + 622 + 6 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198622657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1870 + ... + 20018.

Almost surely, 2^198622656 is an apocalyptic number.

198622656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198622656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299656500).

198622656 is an abundant number, since it is smaller than the sum of its proper divisors (400690344).

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

198622656 is a wasteful number, since it uses less digits than its factorization.

198622656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186 (or 18173 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 198622656 is about 14093.3550299423. The cubic root of 198622656 is about 583.4579946544.

It can be divided in two parts, 1986 and 22656, that added together give a palindrome (24642).

The spelling of 198622656 in words is "one hundred ninety-eight million, six hundred twenty-two thousand, six hundred fifty-six".