198817656 has 16 divisors (see below), whose sum is σ = 497044200. Its totient is φ = 66272544.

The previous prime is 198817583. The next prime is 198817693. The reversal of 198817656 is 656718891.

It is a junction number, because it is equal to n+sod(n) for n = 198817599 and 198817608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4142011 + ... + 4142058.

Almost surely, 2^198817656 is an apocalyptic number.

It is an amenable number.

198817656 is an abundant number, since it is smaller than the sum of its proper divisors (298226544).

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

198817656 is a wasteful number, since it uses less digits than its factorization.

198817656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8284078 (or 8284074 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 198817656 is about 14100.2714867480. The cubic root of 198817656 is about 583.6488709933.

The spelling of 198817656 in words is "one hundred ninety-eight million, eight hundred seventeen thousand, six hundred fifty-six".