198070656 has 128 divisors (see below), whose sum is σ = 620943360. Its totient is φ = 54743040.

The previous prime is 198070603. The next prime is 198070669. The reversal of 198070656 is 656070891.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82140 + ... + 84516.

It is an arithmetic number, because the mean of its divisors is an integer number (4851120).

Almost surely, 2^198070656 is an apocalyptic number.

198070656 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 198070656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310471680).

198070656 is an abundant number, since it is smaller than the sum of its proper divisors (422872704).

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

198070656 is a wasteful number, since it uses less digits than its factorization.

198070656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 198070656 is about 14073.7577071655. The cubic root of 198070656 is about 582.9169895159.

The spelling of 198070656 in words is "one hundred ninety-eight million, seventy thousand, six hundred fifty-six".